Charisma Carpenter is accusing director Joss Whedon of on-set misconduct, saying that he "abused his power" while working with her on his hit shows Buffy the Vampire Slayer and Angel.

The filmmaker, also known for his work on films The Avengers and Justice League, has not commented on the actress' remarks, which she posted on Instagram on Wednesday, Feb. 10. Carpenter, 50, played Cordelia Chase on Buffy between its 1997 debut and 1999, after which she moved onto a more prominent role on the spinoff Angel, which ended its five-season run in 2004.