It took almost 20 years to be in a better place: Prince William on Princess Diana's death

In his most honest and revealing interview, Prince William opened up about his mother Princess Diana's tragic death and how he wished his mother could have met his wife Kate Middleton and children.

The Duke of Cambridge, in an interview with GQ magazine, said "he is in a better place now," but it took him 20 years to get there. He also revealed that he misses his mother and it makes him sad that she will not be able to meet her grandchildren.

Also Read: Princess Diana 'caught up on sleep' during honeymoon; Prince Charles cried the night before wedding

"It has taken me almost 20 years to get to that stage. I still find it difficult now because at the time it was so raw. And also it is not like most people's grief, because everyone else knows about it, everyone knows the story, everyone knows her," he said in the interview.

"I would like to have had her advice. I would love her to have met Catherine and to have seen the children grow up. It makes me sad that she won't, that they will never know her."

As the 20^th death anniversary of Diana nears, William says he is in a better position to talk about his mother more openly. "I am in a better place about it than I have been for a long time, where I can talk about her more openly, talk about her more honestly, and I can remember her better, and publicly talk about her better."

The interview by Alastair Campbell is focused on William's ongoing campaign -- Heads Together campaign – working on mental health issues. The father of two said the taboo and stigma surrounding mental health need to be tackled.

"I've been really shocked how many people live in fear and in silence because of their mental illness. I just don't understand it. I know I come across as quite reserved and shy, I don't always have my emotions brewing, but behind closed doors I think about the issues, I get very passionate about things. I rely on people around me for opinions, and I am a great believer in communication on these issues," he said.