O
- Simon Oates
- Maurice O'Connell
- Ian Ogilvy
- Frank Olegario
- Frank Oliver
- April Olrich
- Kate O'Mara
- Zorenah Osborne
- Valerie Van Ost
- Brian Oulton
- Richard Owens
Read more about this topic: List Of Avengers And New Avengers Cast Members
O
Read more about this topic: List Of Avengers And New Avengers Cast Members