Alfa Anderson — a major part of the disco band Chic — has passed away … this according to one of her former bandmates.

The disco legend passed away earlier this week, according to founder of Chic Nile Rodgers … who shared several throwback pics of the group together with “RIP Alfa Anderson. CHIC Organization” written on it.

He adds she is “forever loved” … and did not include a cause of death in his post.

Alfa rose to prominence as one of the main vocalists for Chic … joining the group in 1977 when legendary singer Luther Vandross encouraged her to audition.

She started out as a backup singer for the group … but quickly moved up to a main singing role after Norma Jean Wright — one of the OG singers — decided to leave the group in 1978.

During her time as a co-main with Luci Martin, Chic dropped hit songs like “Le Freak,” “Good Times” and “My Forbidden Lover” — all of which Anderson played a major part in producing.

The original Chic broke up in 1983 … and Anderson toured as a solo act with Vandross — including playing legendary Wembley Stadium during this period.

Among the other big names she worked with … Bryan Adams, Mick Jagger, Teddy Pendergrass, Jennifer Holliday and many more stars.

Alfa continued to record in her later years … appearing on the song “I’ll Be There” in 2015 after a new generation reformed Chic.

Anderson was also serious about education … becoming a high school principal in the 1990s — with her former school, El Puente Academy for Peace and Justice High School in Brooklyn writing a touching tribute to her.

Alfa was 78.