- O'Brien, Soledad
- O'Connor, Frances
- O'Connor, Renee
- O'Hara, Catherine
- O'Keefe, Jodi Lyn
- O'Toole, Annette
- Obradors, Jacqueline
- OBrien, Margaret
- OBrien, Mariah
- OConnor, Frances
- OConnor, Glynnis
- OConnor, Renee
- ODell, Nancy
- Odessa, Devon
- ODonnell, Rosie
- Ogden, Diane
- OGrady, Gail
- OGrady, Lani
- Oh, Sandra
- OHara, Catherine
- OHara, Maureen
- Ohmart, Carol
- OKeefe, Jodi Lyn
- Okonedo, Sophi
- Oleynik, Larisa
- Olin, Lena
- Oliver, Edna May
- Olmstead, Gertrude
- Olsen, Mary Kate and Ashley
| - Olsen, Susan
- Olson, Heather Lauren
- Olson, Kaitlin
- Omahyra
- Omarosa
- ONeal, Tatum
- ONeil, Nance
- ONeil, Sally
- ONeill, Jennifer
- Ontiveros, Lupe
- Oreiro, Natalia
- Ormond, Julia
- ORourke, Heather
- Orr, Ashley Rose
- Ortiz, Ana
- Ortiz, Valery
- Osborne, Marie
- Osbourne, Sharon
- Osment, Emily
- Osmond, Marie
- Ostriche, Muriel
- Ostrom, Meredith
- Ostrosky, Beth
- OSullivan, Maureen
- Oteri, Cheri
- Otto, Miranda
- Outhwaite, Tamzin
- Owen, Seena
- Oxenberg, Catherine
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