Was the song do a deer specially written for the movie the sound of music?

Yes, the song "Do-Re-Mi" (often referred to by its opening line "Do, a deer") was specifically written for the musical and film "The Sound of Music." Composed by Richard Rodgers and lyricist Oscar Hammerstein II, it serves as a key moment in the story where Maria teaches the von Trapp children about music using the solfège system. The song has become one of the most iconic pieces from the production.