Hakeem Olajuwon		63 y.o.	rating 19/100
Warner Oland		146 y.o.	rating 33/100
Keith Olbermann		67 y.o.	rating 96/100
Daniel Olbrychski		81 y.o.	rating 19/100
Hugh Beaumont		117 y.o.	rating 15/100
Gabriel Olds		54 y.o.	rating 23/100
Richard Beaumont		64 y.o.	rating 78/100
Vinícius de Oliveira		40 y.o.	rating 42/100
Barret Oliver		52 y.o.	rating 58/100
Michael Oliver		44 y.o.	rating 16/100
Steve Oliver		84 y.o.	rating 34/100
Vic Oliver		127 y.o.	rating 33/100
Richard Olivier		64 y.o.	rating 97/100
Alberto Olmedo		92 y.o.	rating 78/100
Bodie Olmos		50 y.o.	rating 96/100
Mico Olmos		53 y.o.	rating 29/100
Dennis Olsen		88 y.o.	rating 62/100
Eric Christian Olsen		48 y.o.	rating 80/100
Jim Beaver		75 y.o.	rating 45/100
Johnny Olson		115 y.o.	rating 68/100
Mike Beaver		52 y.o.	rating 11/100
Merlin Olsen		85 y.o.	rating 98/100
Moroni Olsen		136 y.o.	rating 92/100
Lord Beaverbrook		146 y.o.	rating 43/100
Lute Olson		91 y.o.	rating 33/100
Mitchell Olson		49 y.o.	rating 55/100
Wesley Snipes		63 y.o.	rating 7/100
Scott Olynek		46 y.o.	rating 95/100
Timothy Olyphant	Nominated for Primetime Emmy.	57 y.o.	rating 93/100
Andy On		49 y.o.	rating 33/100
Michael Ondaatje		82 y.o.	rating 99/100
Jerry Only		67 y.o.	rating 87/100
Steve Ontiveros		65 y.o.	rating 54/100
Michael Ontkean		80 y.o.	rating 95/100
Paul Sorvino		87 y.o.	rating 7/100
David Opatoshu	Won Primetime Emmy.	108 y.o.	rating 9/100
Max Ophüls	Nominated for 2 Oscars.	124 y.o.	rating 14/100
Arve Opsahl		104 y.o.	rating 64/100
Roy Orbison		90 y.o.	rating 57/100
Felice Orlandi		101 y.o.	rating 37/100

Actor