Knocked Up is a 2007 American romantic comedy drama film co-produced, written, and directed by Judd Apatow. Starring Seth Rogen, Katherine Heigl, Paul Rudd, and Leslie Mann. The film follows the repercussions of a drunken one-night stand between Rogen's slacker character and Heigl's just-promoted media personality that results in an unintended pregnancy. A spin-off sequel, This Is 40, was released in 2012.