Tuppence Middleton bravely opens up about her struggle with OCD ahead of International Women's Day

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READ: Meet the cast of ITV's gripping new thriller Our HouseChatting to Fearne Cotton on her award-winning podcast Happy Place, Tuppence went into detail about her struggles and revealed she also suffers with emetophobia - a fear of being sick, and how that connects to her OCD and anxiety.WATCH: Inside Downton Abbey's Highclare castleRecalling when her symptoms started, she said: "I must've been 11 or 12 when I first started to show signs of it.

My parents hadn't really heard of it and we had to go to lots of different specialists to talk about it because it wasn't something people knew much about or certainly didn't talk about publicly.MORE:  Fearne Cotton inundated with support as she marks incredible achievementREAD: See the cast of Downton Abbey at the start of their careers"When I was a teenager, it was much more counting numbers - more mental counting.

Then as I got into my late teens and early twenties it became much more about anxiety and panic attacks and as I've gotten older it's been more routine based.

Tuppence Middelton looking breathtaking at the world premiere of Downton Abbey "All of these things have always been there in slightly different forms, and they've always seemed to come from an overriding thought which is emetophobia which is a fear of vomiting, which is a really specific fear."Making light of the revelation, Tuppence joked that she is delighted to meet anyone else who suffers with the same condition as it makes her "feel like a total odd-ball".She also confessed how it impacts her day-to-day life: "Every time I go on a plane I think about it, I scan the crowd of people and everyone once they're on the plane to look for signs of possible illness, are they going to develop some kind of hideous.