Britain's Catherine, Duchess of Cambridge arrives for a Huffington Post meeting, at Kensington Palace...
Britain's Catherine, Duchess of Cambridge (R) and Steven Hull of the Huffington Post, arrive for a Huffington Post meeting at Kensington Palace in London, Britain February 17, 2016. Britain's Prince William and his wife Kate would seek help for their children George and Charlotte if they had mental health problems one day, Kate wrote in a blog published on Wednesday that sought to tackle the stigma associated with mental illness. REUTERS/Chris Jackson/pool