You're a Big Boy Now is a soundtrack album by the Lovin' Spoonful, released in 1967, containing music from the Francis Ford Coppola film of the same name.

Composed entirely by Spoonful member John Sebastian, it contains several songs performed by the band, as well as instrumental music from the film score.

It was re-released on CD along with What's Up, Tiger Lily?, the Spoonful's soundtrack for the 1967 Woody Allen film.

The songs "Darling Be Home Soon" and "You're a Big Boy Now" were released as singles on the Kama Sutra label.

Music critic William Ruhlmann wrote of the album, "Most of the rest of the score consisted of instrumentals, many augmented by an uncredited orchestra, but Sebastian's title song was also impressive.