What was the name of first rock band Madonna performed in?

The first rock band Madonna performed in was the Breakfast Club.

Before becoming a solo superstar, Madonna joined the New York band Breakfast Club in the late 1970s. She initially played drums and later sang lead vocals, gaining early experience in the city’s developing punk, new wave, and club-music scene. The group was associated with brothers Dan and Ed Gilroy, and Madonna lived and rehearsed with members of the band in Queens.

Madonna eventually left Breakfast Club in 1980 to form another group, Emmy and the Emmys, with musician Stephen Bray. That project helped her develop as a singer and songwriter before she began pursuing a solo recording career. Her early band work is often overlooked because her later image became strongly associated with dance-pop.

Breakfast Club should not be confused with Black Sabbath or The Who, which were established rock acts Madonna did not perform with. Pretty in Pink is also not a band; it is the title of a 1986 film and its associated soundtrack song by The Psychedelic Furs.