The song “Kiss Me Once – KIss Me Once Again”was written by Jule Styne and Sammy Cahn, and it was a hit at the end of World War II. The lyrics are written from the perspective of someone welcoming home their spouse or lover at the end of the war. The recording by Harry James with vocals by Kitty Kallen reached number one in the US in November 1945. The Harry James and Kitty Kallen version has been used on various occasions in the Marvel Cinematic Universe, as a tragic piece of music for Steve Rogers/Captain America (Chris Evans) and his love interest Peggy Carter (Hayley Atwell). It was first used in Captain America: The Winter Soldier, when Nick Fury (Samuel L Jackson) hides in Steve’s apartment after an assassination attempt by HYDRA agents. It is later used at the end of Avengers: Endgame, when Steve travels back in time and lives out his life with Peggy. The pair share a slow dance to the song, referencing the dance Rogers promised her soon before he was lost in ice for 70 years. The song’s title is also somewhat similar to a line uttered by an aged Peggy in The Winter Soldier, where she tells Steve: “It’s been so long. So long. Steve replies: “Well, I couldn’t leave my best girl. Not when she owes me a dance.”