Jenna Coleman is very "emotional" about leaving 'Doctor Who'.

Jenna Coleman

Jenna Coleman

The 29-year-old beauty - who has portrayed Clara Oswald, the Doctor's companion since 2012 - admits her departure from the BBC One show has "been in the works" for a while.

She said: "It was emotional! It's been in the works for a very long time. Steven [Moffat] and I sat down a year and a half ago and tried to work out the best place to do it, and the best place to tell a really good story - hopefully that's what we've done. I think it's really cool ... obviously we're not going to give away any details but it will happen at some point this season."

And whilst Jenna is looking forward to her new projects, she believes 'Doctor Who' is a "unique beast".

She added: "There's not a lot of jobs where you get to go to work and have a spaceship and an alien is your best mate and also run away from monsters ... you kind of think this job is only going to happen once. It's been so much fun, it's such a unique beast."

However, Jenna has ensured she will never forget the show after she admitted to stealing a prop from the set.

Speaking on BBC Radio 1's Breakfast Show with Nick Grimshaw, she shared: "I think I'm in denial - I don't feel like I've left; I still see Peter [Capaldi] all the time, so I kind of believe I still have a key to the Tardis - which I might do because I kind of stole it."