It seems that fans shouldn't expect a sequel to one of this year's big animated 3D hits. According to , DreamWorks Animation has announced that there won't be a sequel to this year's animated hit Monsters Vs. Aliens.

While the film performed well domestically, taking in $198 million, a sequel to the film was never a sure thing due to a lukewarm international reception. The film made $380 million worldwide, but performed poorly in several key international markets.

"I'd like to tell you there's a perfectly rational, clear and easy answer as to why not, but there isn't," said DreamWorks Animation head Jeffrey Katzenberg.

Monsters Vs. Aliens was released March 27th, 2009 and stars Reese Witherspoon, Seth Rogen, Hugh Laurie, Will Arnett, Kiefer Sutherland, Rainn Wilson, Stephen Colbert, Paul Rudd. The film is directed by Rob Letterman, Conrad Vernon.