All of a Sudden

All of a Sudden may refer to:
 * All of a Sudden (1996 film), a 1996 Hong Kong film
 * All of a Sudden (2016 film), a 2016 German film
 * All of a Sudden (album), an album by John Hiatt
 * "All of a Sudden", a song by Sweeney Todd from If Wishes Were Horses (album)
 * "All of a Sudden", a song by Bette Midler from Some People's Lives
 * "All of a Sudden", a song by Yes from Open Your Eyes (Yes album)
 * "All of a Sudden", a song by Lil Baby, featuring Moneybagg Yo, from the album Too Hard
 * "All of a Sudden", a song by XTC from their 1982 album English Settlement