Searxng/Mayfair Witches season 3 Celebrity Season 3 filming wraps! Alexandra Daddario returns as Rowan in Mayfair Witches. New showrunner shares update. Expected 2026 on AMC. March 25, 2026 AceShowbiz - Alexandra Daddario's horror series Mayfair Witches is moving forward with exciting developments as the showrunner announced a significant filming milestone for its upcoming third season.