Ashley Wheater, a longtime ballet master of the San Francisco Ballet and an alumnus of Chicago’s Joffrey Ballet, has been named as Joffrey’s new artistic director, according to the Associated Press.

Wheater, 48, will take over for co-founder Gerald Arpino. Arpino, 84, became artistic director emeritus in July; he co-founded the troupe in 1956 with its namesake, the late Robert Joffrey.