Michael Steele, born Susan Nancy Thomas, is an American bassist, guitarist, songwriter, and singer, best known as the bass player for the Bangles. Under the name Micki Steele, she was a founding member of the Runaways but left in 1975, shortly before the band's major label debut. For the next several years, she played with various other musical groups for short periods of time.

In 1983, Steele replaced original bassist Annette Zilinskas as a member of the Bangles. Steele made her entrance just in time to play on the band's first full-length album, All Over the Place. She remained with the Bangles throughout the high point of their career, contributing as bassist, vocalist, and songwriter until the band's dissolution in 1989. She rejoined the band for a 2003 reunion album, Doll Revolution, and toured with them until the following year.