O. MadhavanIndian film actor- O. P. NayyarIndian film music composer, singer-songwriter, music producer, and musician
- Ochira VelukkuttyTheatre actor
Oduvil UnnikrishnanIndian actor (1944-2006)
Ohanna ShivanandIndian model, film and television actress (born 1982)
OhmkarIndian television presenter and film director- Oinam ThoibaIndian actor and director (1954 to 2025)
- Ojaswi OberoiIndian television actress
Oliver StoneAmerican film director, screenwriter, and producer (born 1946)
Olivia ColmanBritish actress
Olivia de HavillandBritish actress (1916 to 2020)
Olivia Newton-JohnBritish and Australian singer (1948 to 2022)
Olivia RodrigoAmerican singer-songwriter and actress (born 2003)
Olivia WildeAmerican actress and film director (born 1984)- Om KatareIndian actor
Om PrakashIndian actor (1919 to 1998)
Om Prakash RaoIndian film director
Om PuriIndian actor (1949 to 2017)- Om SahaniIndian film and television actor
- Om ShivpuriIndian actor
Omi VaidyaIndian actor
Omkar Das ManikpuriIndian actor
Omkar KapoorIndian actor- Onkar RautIndian actor
- OohaIndian actress
OpheliaIndian actress and singer (1938 to 2016)
Oprah WinfreyAmerican talk show host, actress, producer, and author (born 1954)- Orko SinhaIndian film director
Orlando BloomEnglish actor and model (born 1977)1
Orson WellesAmerican actor and filmmaker (1915 to 1985)
Osman Khalid ButtPakistani actor and director- Ottapalam PappanMalayalam film actor (1945-2013)
OviyaSouth Indian actress
Owen WilsonAmerican actor (born 1968)1
