Hakeem Olajuwon		63 y.o.	rating 27/100
Warner Oland		146 y.o.	rating 37/100
Keith Olbermann		67 y.o.	rating 98/100
Daniel Olbrychski		81 y.o.	rating 78/100
Hugh Beaumont		117 y.o.	rating 36/100
Gabriel Olds		54 y.o.	rating 9/100
Richard Beaumont		65 y.o.	rating 72/100
Vinícius de Oliveira		41 y.o.	rating 88/100
Barret Oliver		52 y.o.	rating 88/100
Michael Oliver		44 y.o.	rating 26/100
Steve Oliver		84 y.o.	rating 65/100
Vic Oliver		128 y.o.	rating 15/100
Richard Olivier		64 y.o.	rating 67/100
Alberto Olmedo		92 y.o.	rating 78/100
Bodie Olmos		50 y.o.	rating 25/100
Mico Olmos		54 y.o.	rating 29/100
Dennis Olsen		88 y.o.	rating 64/100
Eric Christian Olsen		49 y.o.	rating 3/100
Jim Beaver		75 y.o.	rating 62/100
Johnny Olson		116 y.o.	rating 23/100
Mike Beaver		52 y.o.	rating 60/100
Merlin Olsen		85 y.o.	rating 98/100
Moroni Olsen		137 y.o.	rating 91/100
Lord Beaverbrook		147 y.o.	rating 86/100
Lute Olson		91 y.o.	rating 73/100
Mitchell Olson		49 y.o.	rating 92/100
Wesley Snipes		63 y.o.	rating 31/100
Scott Olynek		46 y.o.	rating 6/100
Timothy Olyphant	Nominated for Primetime Emmy.	58 y.o.	rating 74/100
Andy On		50 y.o.	rating 58/100
Michael Ondaatje		82 y.o.	rating 51/100
Jerry Only		67 y.o.	rating 97/100
Steve Ontiveros		65 y.o.	rating 43/100
Michael Ontkean		80 y.o.	rating 69/100
Paul Sorvino		87 y.o.	rating 39/100
David Opatoshu	Won Primetime Emmy.	108 y.o.	rating 30/100
Max Ophüls	Nominated for 2 Oscars.	124 y.o.	rating 37/100
Arve Opsahl		105 y.o.	rating 49/100
Roy Orbison		90 y.o.	rating 59/100
Felice Orlandi		101 y.o.	rating 63/100

Actor