Mary Wilson, the longest-reigning original Supreme, has died at 76 years old.
Wilson died Monday night at her home in Las Vegas and the cause was not immediately clear, said publicist Jay Schwartz.
Wilson, Diana Ross and Florence Ballard made up the first successful configuration of The Supremes.
Ballard was replaced by Cindy Birdsong in 1967, and Wilson stayed with the group until it was officially disbanded by Motown in 1977.
The group’s first No. 1, million-selling song, “Where Did Our Love Go,” was released June 17, 1964.
It would be the first of five consecutive No. 1s, with “Baby Love,” “Come See About Me,” Stop! In the Name of Love” and “Back in My Arms Again” following in quick succession.