Simon McBurney as Oliver Cromwell, "The Lord Protector" Maria Doyle Kennedy as Moll MacTíre, a wolfwalker, the leader of the wolf pack and Mebh's mother. Tommy Tiernan as Seán Óg, a woodcutter who believes in the existence of the wolfwalkers after they heal him. Jon Kenny as Ned Stringy John Morton as Stumpy Paul Young as Sheep Farmer Nora Twomey as Bridget, the head housekeeper of the Lord Protector's scullery.