In My Super Ex-Girlfriend, Jenny Johnson yearns for love. Unfortunately, she has found sustaining a relationship to be extremely difficult. The problem? Jenny has a potentially deadly secret, one that could put her partners in peril. Although Jenny appears normal at first glance, she's actually G-Girl, a superhero who must protect the world from evil.

Nobody, including Jenny's (Uma Thurman) new boyfriend Matt (Luke Wilson), knows she is G-Girl. When Matt discovers Jenny to be impatient, loud, vulnerable, clingy, needy and psychotic, his relationship with her turns ugly. Matt has no choice except to end the relationship or be driven insane. This decisions turns out to be a huge mistake. A vengeful Jenny starts to make Matt’s existence unbearable by using her powers and uncontrollable rage against him. Hurt, rejected, and angry at Matt, Jenny destroys the roof of his apartment when she drops in after hurtling his beloved Ford Mustang into deep space. 

Later, while walking down the street one afternoon, Matt is confronted by thugs who throw him into the backseat of a limousine. The men work for Professor Bedlam (Eddie Izzard), who's painted as an evil super-villian and a parody of Superman’s Lex Luthor. Growing up, Bedlam was known as Barry Lambert. He's known Jenny since childhood when the pair were viewed as social misfits. The two quickly became best-friends and then lovers in high school, but this relationship died after a meteorite hit near their car which was parked in a secluded spot late one night. Jenny absorbed a large quantity of radiation from the rock that was left behind, which gave her such super powers as X-ray vision,  the ability to hear everything, to fly and to destroy things with her eyes. The nerdy Jenny then changed her physical appearance and forgot all about Barry.

For years, Professor Bedlam has been harassed and made a target by G-Girl, so he's had it with her. He has strands of Jenny’s hair and has discovered that a rock much like Kryptonite will render her completely powerless, absorbing her powers without hurting her. Jenny would once again become a normal person and only as dangerous as the average ex-girlfriend.

Professor Bedlam, who knows about Matt’s situation and plays up to his desire to have Jenny leave him alone as well, feels that if Wilson can draw Jenny back to him -- and within proximity to the rock -- both their problems will be over. Matt thinks this is a good plan because he's begun a relationship with his colleague Hannah (Anna Faris), who is in peril as the result of Jenny’s jealousy. 

Although realizing this movie was meant to be a parody of comics and films about superheroes, director Ivan Reitman wanted his characters to be believable. He thought of My Super-Ex Girlfriend as another break-up movie with a woman scorned and vengeful, but this time with the added twist of the woman being a superhero, thereby generating laughs -- but played down to provide some resemblance to real situations couples find themselves in.

With some trepidation, Reitman set out to answer whether or not superheroes can have physical intimacy with others. The veteran director also hoped to keep his film family friendly in order to avoid receiving an R-rating.  

From his work as co-executive producer and writer for The Simpsons, screenwriter Don Payne should have the ability to know what bizarre concepts and ideas audiences respond to and how to execute them to get big laughs. Surprisingly, however, this screenplay seems bland, uneven inconsistent in its humor.

My Super-Ex Girlfriend is not helped by Rietman’s cautious, methodical approach in directing. And, although Thurman, Wilson, and Faris deliver solid performances, that's not enough to recommend this film.  

(Released by Twentieth Century Fox and rated "PG-13" for sexual content, crude humor, language and brief nudity. )

Review also posted on www.movie-critiques.com.