Camille Gottlieb, Princess Stephanie of Monaco's daughter, arrives for the tribute to Princess Grace in Monaco November 11, 2017. REUTERS/Eric Gaillard 

Princess Caroline of Hanover arrives for the tribute to Princess Grace in Monaco November 11, 2017. REUTERS/Eric Gaillard 

Princess Caroline of Hanover arrives for the tribute to Princess Grace in Monaco November 11, 2017. REUTERS/Eric Gaillard 

Princess Caroline of Hanover arrives for the tribute to Princess Grace in Monaco November 11, 2017. REUTERS/Eric Gaillard 

Princess Caroline of Hanover, Princess Stephanie of Monaco and her daughter Camille Gottlieb arrive for the tribute to Princess Grace in Monaco November 11, 2017. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Caroline of Hanover, Princess Stephanie of Monaco and her daughter Camille Gottlieb arrive for the tribute to Princess Grace in Monaco November 11, 2017. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Caroline of Hanover, Princess Stephanie of Monaco and her daughter Camille Gottlieb arrive for the tribute to Princess Grace in Monaco November 11, 2017. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Caroline of Hanover, Princess Stephanie of Monaco and her daughter Camille Gottlieb arrive for the tribute to Princess Grace in Monaco November 11, 2017. REUTERS/Eric Gaillard 

Prince Albert II of Monaco arrives with his wife Princess Charlene of Monaco for the 2016 Princess Grace Awards Gala in the Manhattan borough of New York, New York, U.S., October 24, 2016. REUTERS/Carlo Allegri TPX IMAGES OF THE DAY

Princess Charlene of Monaco arrives for the 2016 Princess Grace Awards Gala in the Manhattan borough of New York, New York, U.S., October 24, 2016. REUTERS/Carlo Allegri 

Prince Albert II of Monaco arrives for the 2016 Princess Grace Awards Gala in the Manhattan borough of New York, New York, U.S., October 24, 2016. REUTERS/Carlo Allegri 

Prince Albert II of Monaco arrives for the 2016 Princess Grace Awards Gala in the Manhattan borough of New York, New York, U.S., October 24, 2016. REUTERS/Carlo Allegri 

Prince Albert II of Monaco arrives with his wife Princess Charlene of Monaco for the 2016 Princess Grace Awards Gala in the Manhattan borough of New York, New York, U.S., October 24, 2016. REUTERS/Carlo Allegri 

Prince Albert II of Monaco arrives with his wife Princess Charlene of Monaco for the 2016 Princess Grace Awards Gala in the Manhattan borough of New York, New York, U.S., October 24, 2016. REUTERS/Carlo Allegri 

Prince Albert II of Monaco arrives with his wife Princess Charlene of Monaco for the 2016 Princess Grace Awards Gala in the Manhattan borough of New York, New York, U.S., October 24, 2016. REUTERS/Carlo Allegri 

Prince Albert II of Monaco arrives with his wife Princess Charlene of Monaco for the 2016 Princess Grace Awards Gala in the Manhattan borough of New York, New York, U.S., October 24, 2016. REUTERS/Carlo Allegri 

Prince Albert II of Monaco and his wife Princess Charlene pose at the 2015 Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. Picture taken September 5, 2015. REUTERS/Eric Gaillard 

Prince Albert II of Monaco and his wife Princess Charlene pose at the 2015 Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. Picture taken September 5, 2015. REUTERS/Eric Gaillard 

U.S director Cary Fukunaga poses at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

Swedish model and television host Victoria Silvstedt poses at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

U.S. socialite Lynn Wyatt poses at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

French model and actress Estelle Lefebure poses at the 2015 Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

French dancer and choreographer Jean Christophe Maillot poses at the 2015 Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

U.S actress Jane Krakowski poses at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

U.S actress Jane Krakowski poses at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

Christian Dior Chief Executive Sidney Toledano and his wife Katia arrives at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

Christian Dior Chief Executive Sidney Toledano arrives at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

British actor Roger Moore and his wife Kristina Tholstrup arrive at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

British actor Roger Moore arrives at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

Actor Sir Roger Moore and his wife Kristina Tholstrup arrive at the 2015 Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

British actor Roger Moore and his wife Kristina Tholstrup arrive at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

U.S. actor Robert Redford arrives at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

U.S. actor Robert Redford gestures as he arrives at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

Prince Albert II of Monaco and his wife Princess Charlene pose at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

U.S. actor Robert Redford and his wife Sibylle Szaggars Redford pose at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

U.S. actor Robert Redford and his wife Sibylle Szaggars Redford pose at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

U.S. actor Robert Redford and his wife Sibylle Szaggars Redford pose at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grantsREUTERS/Eric Gaillard 

Sibylle Szaggars Redford, Prince Albert II of Monaco and his wife Princess Charlene, Lynn Wyatt, actor Robert Redford (L-2nd R) and director Cary Fukunaga (R) pose at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

Prince Albert II of Monaco and his wife Princess Charlene pose with Sibylle Szaggars Redford, her husband actor Robert Redford (L-3rd R) and director Cary Fukunaga (R) at the 2015 Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to helping emerging talent in theater, dance, and film by awarding grantsREUTERS/Eric Gaillard 

Prince Albert II of Monaco and his wife Princess Charlene pose at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help emerging talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

Prince Albert II of Monaco and his wife Princess Charlene pose with U.S. actor Robert Redford (R) and his wife Sibylle Szaggars Redford (2nd R) at the Princess Grace Awards gala in Monaco September 5, 2015. The Princess Grace Foundation-USA is a non-profit foundation dedicated to help talent in theater, dance, and film by awarding grants. REUTERS/Eric Gaillard 

Hong Kong tycoon Stephen Hung and his wife Deborah arrive at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

Hong Kong tycoon Stephen Hung and his wife Deborah arrive at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

Hong Kong tycoon Stephen Hung and his wife Deborah arrive at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

A view of the table where Princess Caroline of Hanover is to be seated in the "salle des etoiles" is seen at the Monte Carlo Sporting for the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

A view of the table where Princess Caroline of Hanover is to be seated in the "salle des etoiles" is seen at the Monte Carlo Sporting for the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

A view of the table decorations in the "Salle Des Etoiles" (Stars Room) at the Monte Carlo Sporting is seen during the Bal de la Rose event in Monaco March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

A view of the table decorations in the "Salle Des Etoiles" (Stars Room) at the Monte Carlo Sporting is seen during the Bal de la Rose event in Monaco March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

A general view of the table decorations in the "Salle Des Etoiles" (Stars Room) at the Monte Carlo Sporting is seen during the Bal de la Rose event in Monaco March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

A general view of the table decorations in the "Salle Des Etoiles" (Stars Room) at the Monte Carlo Sporting is seen during the Bal de la Rose event in Monaco March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

A view of the table decorations in the "Salle Des Etoiles" (Stars Room) at the Monte Carlo Sporting is seen during the Bal de la Rose event in Monaco March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

A view of the table decorations in the "Salle Des Etoiles" (Stars Room) at the Monte Carlo Sporting is seen during the Bal de la Rose event in Monaco March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

Prince Emanuele Filiberto di Savoia arrives at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

Pierre Casiraghi (R) and Beatrice Borromeo arrive at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

Prince Albert II of Monaco and his sister Princess Caroline of Hanover pose as they arrive at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

Charlotte Casiraghi, Princess Caroline of Hanover's daughter, arrives at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

Charlotte Casiraghi, Princess Caroline of Hanover's daughter, arrives at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

Japanese fashion designer Kenzo Takada poses as he arrives at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

German designer Karl Lagerfeld poses as he arrives at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard 

German designer Karl Lagerfeld poses as he arrives at the Bal de la Rose in Monte Carlo March 28, 2015. The Bal de la Rose is a traditional annual charity event in aid of Foundation Princess Grace. REUTERS/Eric Gaillard