The trailer for 'My Super Ex-Girlfriend' looks great. Egged on by his smart-ass friend, an ordinary guy asks an awkward, meek-looking brunette out. She's an intense art gallery assistant by day; by night, it turns out that she's a very, very hot crime-fighting superhero. And, even better, she's played by the fantastically sexy Uma Thurman. Sounds good, doesn't it? Don't be fooled. With no appealing characters to root for - take your pick from a heroine who is a petty, neurotic basket case or a too-sappy-for-words hero -  this wannabe romantic comedy/superhero spoof doesn't manage to convince in any area and is ultimately spoiled by rampant amounts of sexist cliché.

Ordinary Guy is Matt Saunders (Luke Wilson). On the rebound, he can't believe his luck when - with a bit of pushing from his friend, ever-hopeful lothario Vaughn Haige (Rainn Wilson) - he starts dating Jenny (Thurman). The sex is super-powered but, when her neediness gets too much, he decides to walk away. It's not so easy, however, to avoid your ex-girlfriend when she's also G-Girl, a blonde, beautiful and strong superhero who can fly into space, lift cars, stop missiles and throw a Great White shark in the window when Matt is with another woman. Just to add more mayhem to the mix, there's also a totally nutty ex of the ex; Professor Bedlam (a hyper-camped Izzard), G-Girl's high school friend turned insecure archenemy. 

After her killer role as The Bride in 'Kill Bill', Uma Thurman is perfectly cast, as much for the image that precedes her as her spectacularly long legs. She's very convincing, both as the vulnerable Jenny and the save-the-city G-Girl, but director Ivan Reitman doesn't know quite what to do with her. Rather than make an entertaining comedy out of the many gender role-reversal possibilities available here (see 'Superman Returns' for a few ideas), Reitman and writer Don Payne (who evidentially got his one-dimensional ideas about characters from his former job as 'The Simpsons' scriptwriter) instead concentrate on how emasculating it could be to have a superhero girlfriend and end up making a film that's uncomfortably misogynistic. Avoid G-Girl and go see a proper superhero instead.

Caroline Hennessy