| Name (3,707) | Functions | Event Dates | Events | Resources |
|---|---|---|---|---|
| Ruby Orascanin | Actor | 1995 | 1 | |
| Euno Orate | Actor | 2022 | 1 | |
| Stefi Orazi | Designer | 2010 | 1 | |
| David Orbach | Flyman | 2016 | 1 | |
| Jerry Orbach | Actor | 1968 | 1 | |
| Richard Orbach | Assistant Director | 1998 | 1 | |
| Ekram Orbay | Performer | 1996 | 1 | |
| Arthur Orbell | Actor | 1918 - 1925 | 4 | |
| Roy Orbison | Composer, Performer, Singer | 1972 - 2004 | 8 | |
| Mario Orbitani | Choreographer | 1982 | 1 | |
| Lilton Orbyt | Performer | 1995 | 1 | |
| Abbey Orchard | Actor | 2016 | 1 | |
| Benjamin Orchard | Actor | 2012 - 2015 | 4 | |
| Chris Orchard | Actor, Actor and Singer, Performer, Scenic Artist | 1966 - 1987 | 21 | |
| Colin Orchard | Set and/or Property Maker, Stage Manager, Technical Director, Workshop Supervisor | 1982 - 1998 | 30 | |
| Henslow Orchard | Musician: Violinist | 1897 | 1 | |
| Ken Orchard | Visual Artist | 1986 | 1 | |
| Lorna Orchard | Actor | 1949 - 1950 | 2 | 1 |
| Madelaine Orchard | Actor | 1979 - 1980 | 3 | |
| Marie Orchard | Scenic Artist | 1991 - 1994 | 5 | |
| Peter Orchard | Composer, Librettist, Singer | 2000 - 2009 | 2 | |
| R B Orchard | Actor | 1909 - 1912 | 2 | |
| Regina Orchard | Actor | 1981 | 3 | |
| Taya Orchard | Actor and Singer | 2014 | 1 | |
| W J Orchard | Actor, Singer | 1896 | 1 | |
| Geoff Orchison | Singer: Tenor | 2007 | 1 | |
| Jessica Orcsik | Actor | 2001 - 2002 | 2 | |
| John Orcsik | Actor, Director, Fight Director | 1966 - 1994 | 46 | |
| Peter Orcsik | Actor | 1967 - 1971 | 7 | |
| Jules Orcullo | Assistant Stage Manager | 2020 - 2023 | 2 | |
| Miriam Orcutt | Dancer | 2017 | 1 | |
| Emma Orczy | Author, Playwright | 1914 - 1935 | 4 | |
| Caitlin Ord | Actor | 1993 | 1 | |
| Constance Ord | Director | 1979 - 2000 | 2 | |
| Duncan Ord | Actor, Associate Lighting Designer, Lighting Designer | 1978 - 2003 | 67 | |
| Katie Ord | 2023 | 1 | ||
| Kerin Ord | Dancer | 1983 | 1 | |
| Mandy Ord | Speaker | 2011 | 2 | |
| Marion Ord | Playwright | 1966 - 1969 | 2 | |
| Robert Ord | Playwright | 1913 - 1926 | 6 | |
| Cyril Ordanel | Composer, Orchestrator | 1969 | 1 | |
| Laurence Orde | Playwright | 1934 | 1 | |
| Tal Ordell | Actor, Actor-Manager, Performer, Playwright, Poet, Producer | 1908 - 1933 | 71 | |
| Rebecca Ordiz | Actor, Actor and Singer, Ensemble Member, Performer | 2023 - 2025 | 5 | |
| John Ordon | Actor | 1972 | 1 | |
| Alfonso Ordonez | Dancer | 1992 | 1 | |
| Antonio Ordonez | Actor, Actor and Singer | 1990 | 2 | |
| M Ordonneau | Librettist | 1895 | 1 | |
| Cecile Ore | Composer | |||
| Marina Oreb-Kare | Actor, Costume Designer | 1962 | 3 | |
| Rostislav Orel | Actor, Director | 1994 - 2001 | 13 | |
| Slava Orel | Actor | 2001 - 2005 | 4 | |
| Mattae Orelean | Performer | 2002 | 1 | |
| Claire Oremland | Musician: Cellist | 1990 | 1 | |
| Stephen Oremus | Conductor, Musical Arranger, Musical Director, Musical Supervisor, Orchestrator | 2008 - 2026 | 21 | |
| Shoshannah Orenstein | Assistant Director, Performer | 1998 - 2002 | 2 | |
| John Oresik | Actor, Director | 1967 - 1993 | 2 | |
| Naomi Oreskes | Speaker | 2016 | 1 | |
| Geoffrey Oreyema | Musician | 1998 | 1 | |
| Carl Orff | Composer | 1964 - 2024 | 19 | |
| Alice Orff-Solscher | Actor | 1931 | 2 | |
| Charlie Orford | Actor | 2013 | 1 | |
| Emmeline Orford | Actor, Actor and Singer | 1920 - 1931 | 14 | |
| Esme Orford | Actor, Actor and Singer, Dancer | 1949 | 2 | |
| Fraser Orford | Company Manager, Producer, Secondment, Stage Manager | 2014 - 2022 | 7 | |
| Henry Orford | Actor and Singer | 1927 | 1 | |
| Jack Orford | Actor, Chorus | 1931 - 1933 | 7 | |
| John Orford | Actor | 1932 | 1 | |
| Julie Orford | Actor, Actor and Singer | 1982 | 1 | |
| Margie Orford | Speaker | 2016 | 1 | |
| Ben-Zion Orgad | Composer | 1968 | 1 | |
| Jason Organ | Assistant Lighting Designer, Lighting Designer, Production Manager, Set Designer, Stage Manager, Technical Director, Technician | 1990 - 2024 | 184 | |
| Michele Organ | Chorus | 1983 | 1 | |
| Rikki Organ | Actor, Singer | 1984 - 1985 | 2 | |
| Tyne-James Organ | Musician | 2021 | 1 | |
| W M Organ | Animal Wrangler/Handler | 1886 - 1888 | 4 | |
| Felicity Organ-Moore | Lighting Designer, Production Manager, Stage Manager, Technical Director | 2005 - 2019 | 42 | |
| Cobie Orger | Choreographer, Dancer, Director, Visual Artist | 2001 - 2019 | 6 | 3 |
| Brandon Orgill | Actor | 2016 | 1 | |
| Victor Oria | Musical Director | 2019 | 1 | |
| Garth Oriander | Photographer | 2012 | 1 | |
| Steve Orich | Orchestrator | 2009 - 2013 | 7 | |
| Atilla Oriel | Speaker | 2013 | 1 | |
| Pierre Orifice | Writer | 1997 | 1 | |
| Vidya Origanti | Actor and Singer | 2003 | 2 | |
| Robert Oriol | Composer | 2021 | 1 | |
| Kevin Orkian | Actor, Musician: Pianist | 2016 | 1 | |
| Laurence Orkin | Writer | 2006 | 1 | |
| Lambert Orkis | Musician: Pianist | 1988 | 2 | |
| Reihanna Orlandi | Dancer | 2009 | 1 | |
| William Orlandi | Costume Designer, Designer, Set Designer | 2016 | 2 | |
| Carlo Orlandini | Actor, Singer | 1877 | 21 | |
| David Orlando | Actor | 2006 - 2009 | 4 | |
| Julia Orlando | Assistant Stage Manager, Production Manager, Stage Manager | 2017 - 2024 | 14 | |
| Kevin Orlando | Actor, Performer, Publicist | 2016 - 2024 | 10 | |
| Orloff | Dancer | 1940 | 1 | |
| Nicholas Orloff | Dance Group, Dancer | 1939 - 1940 | 18 | 2 |
| Oleg Orlov | Dancer | 1994 | 9 | |
| Helen Orlova | Dancer, Performer | 1940 - 1945 | 7 | |
| Ljubov Orlova | Circus Style Performer | 1971 | 1 | |