Cast members Hilary Duff (L) and Debi Mazar participate in Viacom TV Land "Younger" panel at the Television Critics Association (TCA) Winter Press Tour in Pasadena, California January 6, 2016. REUTERS/Alex Gallardo

Cast member Hilary Duff participates in Viacom TV Land "Younger" panel at the Television Critics Association (TCA) Winter Press Tour in Pasadena, California January 6, 2016. REUTERS/Alex Gallardo

Cast member Hilary Duff participates in Viacom TV Land "Younger" panel at the Television Critics Association (TCA) Winter Press Tour in Pasadena, California January 6, 2016. REUTERS/Alex Gallardo

Actress/singer Hillary Duff attends a hockey game to watch her boyfriend Edmonton Oilers' Mike Comrie play against the Minnesota Wild during their NHL hockey game in Edmonton October 16, 2009. REUTERS/Dan Riedlhuber (CANADA SPORT ICE HOCKEY ENTERTAINMENT)

Actress/singer Hillary Duff cheers for her boyfriend Edmonton Oilers' Mike Comrie after he scored a goal against the Minnesota Wild during the second period of their NHL hockey game in Edmonton October 16, 2009. REUTERS/Dan Riedlhuber (CANADA SPORT ICE HOCKEY ENTERTAINMENT)

Actress Hillary Duff waves to the crowd during the Heart Truth's Red Dress Fall 2009 show during New York Fashion Week February 13, 2009. REUTERS/Brendan McDermid (UNITED STATES)

Actress Hilary Duff is pictured at the New York Stock Exchange after ringing the opening bell in New York December 23, 2008. REUTERS/Lucas Jackson (UNITED STATES)

Singer and actor Hillary Duff makes a store appearance in Sydney February 2, 2008. Duff is in Australia to promote her new perfume. REUTERS/Mick Tsikas (AUSTRALIA)

Singer and actor Hillary Duff makes a store appearance in Sydney February 2, 2008. Duff is in Australia to promote her new perfume. REUTERS/Mick Tsikas (AUSTRALIA)

Singer and actor Hillary Duff makes a store appearance in Sydney February 2, 2008. Duff is in Australia to promote her new perfume. REUTERS/Mick Tsikas (AUSTRALIA)

Singer and actor Hillary Duff makes a store appearance in Sydney February 2, 2008. Duff is in Australia to promote her new perfume. REUTERS/Mick Tsikas (AUSTRALIA)

U.S. actress and singer Hillary Duff poses for photographers as she arrives at the MTV Latin America awards in Mexico City October 18, 2007. REUTERS/Henry Romero (MEXICO)

U.S. actress and singer Hillary Duff poses for photographers as she arrives at the MTV Latin America awards in Mexico City October 18, 2007. REUTERS/Henry Romero (MEXICO)

U.S. actress and singer Hillary Duff performs during the MTV Latin America awards in Mexico City October 18, 2007. REUTERS/Daniel Aguilar(MEXICO)

Singer and actress Hilary Duff (R) and her sister, actress Haylie Duff, arrive as guests for the premiere of the film "1408" in Los Angeles, California June 12, 2007. REUTERS/Fred Prouser (UNITED STATES)

U.S. singer Hilary Duff reacts to a question while being interviewed on the television show 'Live@Much' to promote her fifth studio release 'Dignity' in Toronto, April 24, 2007. REUTERS/ Mike Cassese (CANADA)

U.S. singer Hilary Duff laughs while being interviewed on the television show 'Live@Much' to promote her fifth studio release 'Dignity' in Toronto, April 24, 2007. REUTERS/ Mike Cassese (CANADA)

Singer and actress Hilary Duff arrives at the 2005 Teen Choice Awards in Universal City, California in this August 14, 2005 file photo. Duff's new album, "Dignity," addresses issues of teen hearbreak and the crazy people she encounters in Los Angeles. REUTERS/Chris Pizzello/Files (UNITED STATES)

Singer and actress Hilary Duff arrives to attend the 18th annual Gay & Lesbian Alliance Against Defamation (GLAAD) award show in New York March 26, 2007. REUTERS/Lucas Jackson (UNITED STATES)

Pop singer and actress Hillary Duff hugs a student at Nelson Charter School during a ceremony marking the first anniversary of Hurricane Katrina in New Orleans, Louisiana August 29, 2006. REUTERS/Sean Gardner (UNITED STATES)

Pop singer and actress Hillary Duff visits students at Nelson Charter School during a ceremony marking the first anniversary of Hurricane Katrina in New Orleans, Louisiana August 29, 2006. REUTERS/Sean Gardner (UNITED STATES)

Pop singer and actress Hillary Duff visits students at Nelson Charter School during a ceremony marking the first anniversary of Hurricane Katrina in New Orleans, Louisiana August 29, 2006. REUTERS/Sean Gardner (UNITED STATES)

Jenny McCarthy introduces a performance by Hillary Duff during the 2005 American Music Awards at the Shrine Auditorium in Los Angeles November 22, 2005. REUTERS/Lucy Nicholson

Singer & actress Hillary Duff arrives to celebrate her 18th birthday at the club "Mood" in the Hollywood section of Los Angeles, California September 28, 2005. The multi-talented Duff is best known from her role in Disney's Lizzie McGuire show although she is an accomplished film actress and recording artist who recently donated $250,000 to help Hurricane Katrina victims. REUTERS/Lucas Jackson

Singer & actress Hillary Duff arrives to celebrate her 18th birthday at the club "Mood" in the Hollywood section of Los Angeles, California September 28, 2005. The multitalented Duff is best known from her role in Disney's Lizzie McGuire show although she is an accomplished film actress and recording artist who recently donated $250,000 to help Hurricane Katrina victims. REUTERS/Lucas Jackson

Singer & actress Hillary Duff arrives at her 18th birthday party held at the club "Mood" in the Hollywood section of Los Angeles, California September 28, 2005. The multi-talented Duff is best known from her role in Disney's Lizzie McGuire show although she is an accomplished film actress and recording artist who recently donated $250,000 to help Hurricane Katrina victims. REUTERS/Lucas Jackson

Singer & actress Hillary Duff poses with her boyfriend Joel Madden of the band Good Charlotte as the pair arrives at Duff's 18th birthday party held at the club "Mood" in Hollywood at Los Angeles September 28, 2005. Duff is best known for her role in the "Lizzie McGuire" Disney television series. REUTERS/Lucas Jackson

Singer & actress Hillary Duff poses with her boyfriend Joel Madden of the band Good Charlotte as the pair arrives at Duff's 18th birthday party held at the club "Mood" in Hollywood at Los Angeles September 28, 2005. Duff is best known from her role in the "Lizzie McGuire" Disney television series. REUTERS/Lucas Jackson

Hillary Duff models clothing at the 4th annual GM ten fashion show in Hollywood February 22, 2005. REUTERS/Michael Buckner SSM/YH

Haylie Duff (L) and sister Hillary Duff arrive at the 4th annual GM ten fashion event in Hollywood February 22, 2005. REUTERS/Michael Buckner SSM/YH

Hilary Duff performs at the annual KISS-FM Wango Tango On-Air 2004 concert at the Rose Bowl in Pasadena, California May 15, 2004. REUTERS/Gene Blevins GB

Actresses Hillary Duff (L) and Amanda Bynes act as presenters at the
2003 MTV Movie Awards which were taped in Los Angeles May 31, 2003. The
awards show featured musical performances and honored MTV viewers'
favorite movies and movie stars and will be telecast in the United
States June 5. REUTERS/Fred Prouser REUTERS

FSP

Actress Hillary Duff and friend, singer Aaron Carter, arrive to the
premiere of "The Lizzie McGuire Movie" in Los Angeles, April 26, 2003.
Duff plays Lizzie in the Walt Disney Pictures film about a girl, Lizzie
McGuire, who goes to Italy on a class field trip and is mistaken for an
Italian pop artist. REUTERS/John Hayes

JH/GAC

Actress Hillary Duff arrives to the premiere of "The Lizzie McGuire
Movie" in Los Angeles April 26, 2003. Duff plays Lizzie in the Walt
Disney Pictures film about a girl, Lizzie McGuire, who goes to Italy on
a class field trip and is mistaken for an Italian pop artist.
REUTERS/John Hayes

JH

Actress Hillary Duff poses as she arrives as a guest for the premiere of the new action comedy film "Shanghai Knights" February 3, 2003 in Hollywood. [The film stars Jackie Chan and is the sequel to "Shanghai Noon" set in London where Chan's character hunts down a killer. The film also stars Fann Wong and Owen Wilson and opens February 7 in the United States.]

Actress Hillary Duff poses as she arrives as a guest for the premiere
of the new action comedy film "Shanghai Knights" February 3, 2003 in
Hollywood. The film stars Jackie Chan and is the sequel to "Shanghai
Noon" set in London where Chan's character hunts down a killer. The
film also stars Fann Wong and Owen Wilson and opens February 7 in the
United States. REUTERS/Fred Prouser

FSP