"Linus and Lucy" is a popular instrumental jazz standard written by American jazz pianist Vince Guaraldi. It serves as the main theme tune for the many Peanuts animated specials and is named for the two fictional siblings, Linus and Lucy Van Pelt. The jazz standard was originally released on Guaraldi's album Jazz Impressions of A Boy Named Charlie Brown in 1964, but it gained its greatest exposure as part of A Charlie Brown Christmas soundtrack the following year. It is one of the most recognizable pieces by Guaraldi and has gained status as the signature melody of the Peanuts franchise.

Vincent Anthony Guaraldi was an American jazz pianist best known for composing music for animated television adaptations of the Peanuts comic strip. His compositions for this series included their signature melody "Linus and Lucy" and the holiday standard "Christmas Time Is Here". Guaraldi is also known for his performances on piano as a member of Cal Tjader's 1950s ensembles and for his own solo career. Guaraldi's 1962 composition "Cast Your Fate to the Wind" became a radio hit and won a Grammy Award in 1963 for Best Original Jazz Composition. He died of a sudden and unexpected heart attack on February 6, 1976, at age 47, moments after concluding a nightclub performance in Menlo Park, California.