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