Film critics in the US have apparently branded a new movie starring Jennifer Lopez and fiance Ben Affleck a "total disaster".

They said Gigli (2003) is destined to be a box office flop after it left reviewers sniggering at the "laughable dialogue and ludicrous plot".

In the film, J-Lo plays a lesbian assassin who is seduced by hitman Affleck.

The couple fell for each in real life while filming the movie, but on screen, their sexual chemistry is said to be seriously lacking, says The Sun.

One critic reportedly says: "Affleck is just totally miscast and J-Lo is just awful."

In one scene Lopez, 33, tries to seduce Affleck, 30, by laying on a bed and telling him: "It's turkey time!"

When he asks: "What?", she replies: "Come on, gobble, gobble". Another reviewer said: "It was possibly the worst line ever said in a movie."

The film has already undergone extensive reshooting after early previews showed audiences found the ending unbelievable.

Gay rights groups are said to be incensed that J-Lo's character starts off as a lesbian but goes straight - thanks to Affleck.

Source: Press Release