Let's visit the Tooniverse for today's member of the League of Themselves.....
AS SEEN IN:
["Treehouse Of Horror X"]
From 'The Simpsons' Wiki:
Lucy Lawless played Xena in the hit show 'Xena: Warrior Princess'. She appeared in the ('Simpsons') Halloween Special "Treehouse of Horror X" playing herself, although in the persona of Xena.
Anything goes in the Tooniverse!
Ms. Lawless may show up again later this year - IF I can find the right picture!