Young at Heart is a pop standard, a ballad with music by Johnny Richards and lyrics by Carolyn Leigh. The song was written and published in 1953, with Leigh contributing the lyrics to what was originally a Richards instrumental called "Moonbeam." Frank Sinatra was the first performer to record the song, which became a million-selling hit in 1953 (and spilling over with popularity into 1954).

Young at Heart is a 1954 film, directed by Gordon Douglas. It was a remake of the 1938 film Four Daughters, and it starred Frank Sinatra, Doris Day, Gig Young, Ethel Barrymore, and Dorothy Malone.

Young At Heart is the 20th episode of the TV series The Honeymooners. Ralph tries to prove to Alice that he's not a 'Fuddy-Duddy'.