With his eagerness to offend, his vast salary and the obscene ‘Sachsgate’ phone calls, Jonathan Ross is no stranger to controversy.

Now, it seems, his wife Jane Goldman is out to prove that anything he can do, she can do worse.

Miss Goldman has caused outrage with a film she has written featuring a foul-mouthed girl assassin aged only 11.

Jane Goldman has caused outrage with a film she has written featuring a foul-mouthed 11-year-old assassin called Hit-Girl

The character, called Hit-Girl, slices off people’s legs and shoots bullets through a man’s cheek. In one scene, the young serial killer – played by 13-year-old American actress Chloe Moretz – screams at her victims: ‘Okay, you ****s, let’s see what you can do now.’

In another, she tells her vigilante father she wants a puppy for her birthday. When he looks surprised, she says: ‘I’m just f****** with you, Daddy’, and asks for a razor-sharp knife instead.

Jonathan Ross and Jane Goldman: One of the characters is an 11-year-old girl who slices people's legs off

Critics say the movie, titled Kick-Ass, blurs the lines between adult and child entertainment.

Its extreme violence has earned it comparisons with the work of Quentin Tarantino.

It is expected to gain a 15 rating but its violent trailer is already available on the internet.

Kick-Ass, released next month, is based on a comic book series that is advertised with the slogan ‘Sickening violence: Just the way you like it’.

Frank Furedi, professor of sociology at Kent University, criticised the film industry for not distinguishing between what is suitable for children and adults.

‘This promotes the idea that infantilising adulthood is okay and that we are no longer expected to draw lines between us and kids,’ he said.

The film has already provoked complaints in the U.S. after children were allowed to access violent trailers of the film online.

Nell Minow, a lawyer and one of the complainants, said: ‘These particular trailers are even worse than normal because they depict a child and so are more interesting to a child.

‘Isn’t there a limit to what we can ask children to do on screen?’

When asked by one U.S. interviewer about the suitability of an 11-year-old using the C-word, Miss Goldman said: ‘I think that’s the least of our worries.’

Aaron Johnson stars as Kick-Ass, an ordinary American teenage boy who decides to turn himself into a superhero

Robert Thompson, professor of popular culture at Syracuse University, said: ‘It’s still enough of a real taboo that when you hear some of those words coming out of the mouth of an 11-year-old kid, it’s really shocking. But that’s the whole point.’

Los Angeles media analyst Mike Raia said: ‘One of the joint production companies involved is Plan B, which is owned by Brad Pitt.

‘I wonder if he and Angelina Jolie would want their own young children to hear kids cussing in Kick-Ass.’

Protests about the film have also erupted in Australia where John Morrisey of the Family Association said: ‘The language is offensive and the values inappropriate – without the saving grace of the bloodless victory of traditional superheroes.’

Ross was widely criticised in October 2008 after he and the comedian Russell Brand made obscene calls to Andrew Sachs, the former Fawlty Towers actor.

Ross announced in January that he would not be renegotiating his contract with the BBC when it ends in July.

Goldman met Ross when she was a young newspaper columnist and married him when she was just 18 before going on to forge a successful career as a television presenter, author and screenwriter.