Lost in Beijing (Chinese: 苹果; lit. 'apple') is a 2007 Chinese drama film directed by Li Yu and starring Tony Leung Ka-fai, Fan Bingbing, Tong Dawei, and Elaine Jin. It had its international premiere at the 2007 Berlin International Film Festival on February 16, 2007. Lost in Beijing is director Li Yu's third feature film after the lesbian-themed Fish and Elephant (2002) and the drama Dam Street (2005).

Lost in Beijing was produced by Laurel Films, a small independent production company owned by Fang Li and based in Beijing, and is being released internationally by the French company Films Distribution. Distribution in the United States was picked up by New Yorker Films.

Like many films that touch on the underbelly of Chinese society (see for example, Li Yang's Blind Shaft or Blind Mountain, or Wang Xiaoshuai's Beijing Bicycle), Li Yu's tale of prostitution, blackmail, and rape in modern-day Beijing has been plagued with censorship problems. After nearly a year of delays, the film was finally banned by Chinese authorities in January 2008.