Linus and Lucy is a popular jazz piano piece written by Vince Guaraldi, featured in many of the Peanuts animated television specials. Named after the characters Linus and Lucy van Pelt, it was released in 1964 on the Vince Guaraldi Trio's album Jazz Impressions of a Boy Named Charlie Brown. A Charlie Brown Christmas introduced the song to a television audience of millions of children beginning in 1965. Since that special, the song has been included in most of the Peanuts specials.
The song was played to the crew of Space Shuttle Endeavour as wake-up music on Day 2 of the STS-123 mission on March 11, 2008. It was also used as background music for The Weather Channel's local forecasts starting in 1999, and on advertisements for banking firm ANZ and the American insurance company Met Life.
The song is in the key of A-flat major.