Harold & Kumar Go to White Castle (released in some international markets as Harold & Kumar Get the Munchies) is a 2004 American buddy stoner comedy film directed by Danny Leiner, written by Jon Hurwitz and Hayden Schlossberg, and starring John Cho, Kal Penn, Neil Patrick Harris, Anthony Anderson and Fred Willard. The first installment in the Harold & Kumar franchise, the film follows Harold Lee (Cho) and Kumar Patel (Penn) on their adventure to a White Castle restaurant after smoking marijuana.

Hurwitz and Schlossberg developed Harold & Kumar Go to White Castle based on experiences and people from when they attended Randolph High School. The filmmakers received license permission from White Castle in 2002, after consulting with Krispy Kreme; White Castle also contributed to the film's marketing campaign, releasing tie-in products at their restaurants. Cho and Harris (who portrays a fictionalized version of himself) were cast early, whereas Penn attended seven auditions. Principal photography began in 2003, with filming primarily done in Toronto.

Harold & Kumar Go to White Castle was theatrically released in the U.S. on July 30, 2004, by New Line Cinema. The film received positive critical reception, with praise for the performances of its leads (particularly Harris) and subversion of racial and comedic stereotypes. The film has gone on to gather a cult following. The sequel, Harold & Kumar Escape from Guantanamo Bay, was released internationally in April 2008.