PBS

Siobhan Finneran will not be returning for Downton Abbey's upcoming fourth season, a spokesperon for the hit period drama confirms to E! News. Finneran played the villainous maid O'Brien.

"I'm not doing any more," Finneran told HuffPo UK. "O'Brien is a thoroughly despicable human being— that was great to play."

Finneran is just the latest star to leave the hugely popular series: Dan Stevens, who played fan favorite Matthew Crawley, and Jessica Brown Findlay, who played the beloved Lady Sybil, both left the series in season three after their characters were killed off.