Once again donning a disguise as butterball granny Big Momma, FBI agent Turner (Martin Lawrence) goes undercover to stop a national security threat in this madcap sequel. Modeling the latest in frumpy dresses, Turner infiltrates a suspect's house by posing as a nanny. But the mission becomes complicated when Big Momma takes a shine to the three kids. Nia Long, Zachary Levi, Emily Procter and Kat Dennings co-star.