How Do You Know is a 2010 American romantic comedy film directed, written and produced by James L. Brooks, and starring Reese Witherspoon, Owen Wilson, Paul Rudd and Jack Nicholson (in his final film role to date). It was the third film to feature Witherspoon and Rudd following Overnight Delivery and Monsters vs. Aliens. The film was shot in Philadelphia and Washington, D.C. It was released on December 17, 2010, and was a box office bomb, grossing $49 million against a $120 million budget. It received generally negative reviews.