"This Guy's in Love with You" is a hit song written by Burt Bacharach and Hal David and released by Herb Alpert in May, 1968. Although known primarily for his trumpet playing as the leader of the Tijuana Brass, Alpert sang lead vocals on this solo recording, which was arranged by Bacharach. An earlier recording of the song by British singer Danny Williams with different lyrics, titled "That Guy's in Love", appeared on Williams' 1968 self-titled album.

Burt Freeman Bacharach was an American composer, songwriter, record producer, and pianist who is widely regarded as one of the most important and influential figures of 20th-century popular music. Starting in the 1950s, he composed hundreds of pop songs, many in collaboration with lyricist Hal David. Bacharach's music is characterized by unusual chord progressions and time signature changes, influenced by his background in jazz, and uncommon selections of instruments for small orchestras. He arranged, conducted, and produced much of his recorded output.