Is that a trout pout, Billie?

She has been travelling in time and space with Doctor Who. But now some are asking if the Time Lord has turned his hand to cosmetic surgery.

For as Billie Piper collected an acting award, onlookers couldn't help commenting on her apparently fuller lips.

'I could hardly concentrate on what she was saying,' said a member of the audience at Tuesday's National Television Awards in London.

'Even Angelina Jolie's lips aren't that luscious.They were just enormous, and when she smiled they became all tight and unnatural looking.

'Her top lip moved up, exposing all her teeth and her gums. It just looked odd and a lot of people noticed it.'

Others put the look down to carefully applied lipstick, and a spokesman for the 23-year-old said: 'I can categorically say that she has never had any surgery to enhance her lips.'

But leading plastic surgeon Jonathan Baker commented: 'Her lips are startlingly full and plump. Personally, I have never seen anyone whose lips naturally look like that.

'Lips are not normally that full unless they have been exposed to some sort of toxin, such as collagen for example.

'But because there is no scarring from collagen treatments, there would be no way to know if she has had surgery.'

Plastic surgeon Alex Karidis added: 'It looks as if she has had her lips filled with some kind of injectable filler to give them extra volume.'