John Declan Mulligan (April 4, 1938 – November 2, 2021) was an Irish-born American musician, best known as a guitarist of rock band The Beau Brummels in the 1960s.

[1] In early 1964, he met Ron Elliott, Sal Valentino, and John Petersen during an informal rehearsal at the Irish Cultural Center in San Francisco.

[3] He appeared with the band in the 1965 science-fiction/comedy movie Village of the Giants, which was featured in a 1994 episode of Mystery Science Theater 3000.

He sings "Woman" in the film, a song written by Elliott, which ultimately appeared as an instrumental on the band's second album, with Mulligan's vocal being replaced by a lead guitar track.

Jackson Hart), drummer Peter Tucker, and keyboardist James Moyles, released an independent single, "Back to Life" b/w "Native Son", a session produced by Vince Welnick of The Tubes and The Grateful Dead.