Name	Known for
Kathleen Beller Maureen O'Brian Maureen O'Brian See fewer	The Godfather Part II (1974)
Pierce Brosnan Rory O'Manion Rory O'Manion See fewer	Mamma Mia! (2008)
Steve Forrest James Kent (credit only) James Kent (credit only) See fewer	Mommie Dearest (1981)
Peter Gilmore Jim O'Brien Jim O'Brien See fewer	Carry on Up the Khyber (1968)
Nicholas Hammond Sean O'Manion Sean O'Manion See fewer	The Sound of Music (1965)
Hurd Hatfield British Agent British Agent See fewer	The Picture of Dorian Gray (1945)
Simon MacCorkindale David Clement David Clement See fewer	Jaws 3-D (1983)
Kate Mulgrew Rachel Clement Rachel Clement See fewer	Star Trek: Voyager (1995)
Barbara Parkins Charlotte Kent Charlotte Kent See fewer	Valley of the Dolls (1967)
Linda Purl Deirdre O'Manion Deirdre O'Manion See fewer	Mighty Joe Young (1998)
Simon Rouse Eamon Flemming Eamon Flemming See fewer	The Bill (1984)
David Soul Caleb Staunton Caleb Staunton See fewer	Starsky & Hutch (2004)
Laurence Foster Sam Kennedy Sam Kennedy See fewer	Vikings (2013)
Aaron Harris Noonan Noonan See fewer	Bad Choices (2014)
Tom Jordan Seamus Doherty Seamus Doherty See fewer	Remington Steele (1982)
Struan Rodger Brian Brian See fewer	Stardust (2007)
Harry Towb O'Connor O'Connor See fewer	The Blue Max (1966)
Ronnie Walsh General Marley General Marley See fewer	Insurrection (1966)