Confident Rupert Grint

Apr 25, 2010, 9:30 GMT

Rupert Grint finally feels like a confident actor.

The 'Harry Potter' star - who shot to fame in 2001 after landing the role of Ron Weasley in the wizarding franchise - admitted he used to have concerns about his acting abilities and whether he was talented enough, but that's a thing of the past now he's hit his twenties.

He said: "When you're working with people that have been classically and professionally trained, it makes you feel a bit... I don't know. I've definitely, I've gained confidence really, just the more you do."

The 21-year-old star recently finished work on 'Cherrybomb' - in which he plays a teenager caught in a whirlwind of sex, drink, drugs and crime - and admits it felt strange filming something so out of his "comfort bubble".

He said: "It was the first kind of real adult role for me really so I was quite nervous about it. It did feel like a massive step, as it's kind of away from home. We filmed it in Belfast, out of the whole comfort bubble of 'Harry Potter' really, as I've known everyone there for all my life. I had to speak with a different accent, so yeah everything felt different and it took me a while to adjust to that."

Rupert also admitted he feels he has a responsibility not to go off the rails because his fans see him as a role model.

He said: "I do feel like I just have to behave and not be too controversial. Going out in London is hard to do."