Stars with Names beginning with O * denotes media available
- Evelyne Armela O'Bami *
- Tracy O'Brian
- Becky O'Brien *
- Eileen O'Brien
- Frankie O'Brien
- Mariah O'Brien *
- Maureen O'Brien *
- Miki O'Brien *
- Nancy O'Brien *
- Olga O'Brien *
- Shauna O'Brien *
- Kelly O'Byrne *
- Ciara O'Callaghan *
- Cindy O'Callaghan
- Helen O'Connell *
- Natalie O'Connell *
- Taaffe O'Connell *
- Frances O'Connor *
- Glynnis O'Connor *
- Hazel O'Connor
- Renée O'Connor *
- Aubrey O'Day *
- Jennifer O'Dell *
- Mary Ann O'Donnell
- Rosie O'Donnell *
- Gail O'Grady *
- Lani O'Grady *
- Catherine O'Hara
- Maureen O'Hara *
- Caitlin O'Heaney *
- Jodi Lyn O'Keefe *
- Kate O'Malley
- Kate O'Mara *
- Kim O'Mara *
- Elaine O'Meara *
- Tatum O'Neal *
- Linda O'Neil *
- Caroline O'Neill
- Jennifer O'Neill *
- Lesley Clare O'Neill
- Maggie O'Neill *
- Remy O'Neill *
- Tara Lynne O'Neill
- Geraldine O'Rawe
- Erin O'Reilly *
- Genevieve O'Reilly *
- Darby O'Riley *
- Stephanie O'Rourke *
- Amber O'Shea *
- Missy O'Shea
- Adrienne O'Sullivan
- Aisling O'Sullivan *
- Gunargie O'Sullivan *
- Maureen O'Sullivan *
- Annette O'Toole *
- Katia O'Wallis
- Randi Oakes *
- Patti Oatman
- Agnès Obadia *
- Olecia Obarianyk
- Uschi Obermaier *
- Claire Oberman *
- Jacqueline Obradors *
- Ana Obregón *
- Celeste Octavia *
- Deborah Odell *
- Devon Odessa *
- Gabrielle Odinis *
- Adepero Oduye *
- Raffaella Offidani *
- Asami Ogawa *
- Mariko Ogawa
- Minako Ogawa
- Nana Ogawa
- Tamaki Ogawa *
- Bulle Ogier *
- Pascale Ogier *
- Keiko Oginome *
- Natalie Ogle *
- Daniela Ognibene *
- Sandra Oh *
- Yun-hong Oh *
- Cláudia Ohana *
- Christiane Ohliger *
- Mikio Ohno *
- Carolin Ohrner *
- Machiko Ohtani
- Nao Oikawa *
- Kimberly Oja *
- Angie Ojciec *
- Lucia Ojeda
- Naomi Oka *
- Naomi Oki *
- Sophie Okonedo
- Anna Okuszko
- Carla Olcina
- Kelsey Oldershaw *
- Dora Elsa Olea *
- Larisa Oleynik *
- Lena Olin *
