Kevin James is seeking big laughs in his latest summer comedy, 'Zookeeper,' in which he plays, well, a zookeeper whose animals reveal they can talk when he decides he wants to leave to find a more glamorous job.

Though it's sure to be a hit with families this weekend, adults may opt for the R-rated 'Horrible Bosses' instead, which stars Jason Bateman, Charlie Day and Jason Sudekis as three disgruntled employees who decide they want to kill their bosses.

Which movie will win the box office? We'll know on Sunday. In the meantime, get a rundown of the biggest movies in theaters this weekend.

'Zookeeper'

Directed by: Frank Coraci
Starring: Kevin James, Rosario Dawson
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'Horrible Bosses'

Directed by: Seth Gordon
Starring: Jason Bateman, Charie Day, Jason Sudekis, Colin Farrell, Jennifer Aniston, Kevin Spacey, Jamie Foxx
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'Larry Crowne'

Directed by: Tom Hanks
Starring: Tom Hanks, Julia Roberts
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'Bad Teacher'

Directed by: Jake Kasdan
Starring: Cameron Diaz, Jason Segel, Lucy Punch, Phyllis Smith, Justin Timberlake
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'The Green Lantern'

Directed by: Martin Campbell
Starring: Ryan Reynolds, Blake Lively, Peter Sarsgaard
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'mr. popper's penguins'

Directed by: Mark Waters
Starring: Jim Carrey
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'Super 8'

Directed by: J.J. Abrams
Starring: Kyle Chandler, Elle Fanning, Joel Courtney and more
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