Kristen Stewart used to vomit "every day" because she was so panicked by fame.

She explained: "I went through so much stress. I had panic attacks, I used to puke every day and very casually too. I didn't have an eating disorder; it wasn't to do with that. I always had a stomach ache. And I was a control freak. I couldn't anticipate what was going to happen in a given situation, so I'd be like, 'Maybe I'm going to get sick' and then I'd be sick."

And it wasn't just her battle with anxiety that was taking over her life as the blonde beauty was also desperately trying to curb her fight against obsessive compulsive disorder (OCD).

She explained: "As I am getting older I'm going into my OCD. If things are a mess, I feel like I have lost everything. So I procrastinate by tidying, which is so stupid. I say to myself, 'Just do what you need to do. If you want to write something, if you need to get a thought out, if you need to call someone about something creative, do it now! You don't need to organise your desk first."

And, although she still gets short bursts of uneasiness, Kristen has learnt to deal with her mental health issues and focus on the things that are thrown at her on a day-to-day basis.

Speaking to Elle magazine,she said: "I changed, that's the thing - at a certain time point I realised that the fear was death, but I had gone through so much that did not kill me... sorry, I know that sounds dramatic ... I realise the anxiety just ran out. I didn't have the energy to do that anymore."