"Young at Heart" is a pop standard ballad with music by Johnny Richards and lyrics by Carolyn Leigh.
[1] 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 late 1953 (and spilling over with popularity into 1954) where it reached the No.
In 2016, at age 90, Dick Van Dyke recorded a duet with his wife, Arlene, at Capitol Records Studio in Los Angeles, filmed for the HBO special on aging If You're Not in the Obit, Eat Breakfast, starring Carl Reiner and featuring Mel Brooks, Norman Lear, Stan Lee, Betty White and others over 90 years old.
The song has also been used on the soundtracks of other films, including The Cure incorporated verses from "Young at Heart" during concert performances of "Why Can't I Be You?"