| artistica, Collaborazione | Collaborazione artistica | | | | |
| Arvidsson-Kylin, Isabel | Isabel Arvidsson-Kylin | Actor | 2001 | 4 | |
| Asakura, Setsu | Setsu Asakura | Designer | 1968 - 2009 | 2 | |
| Ashby, Anne | Anne Ashby | Actor | 2000 | 1 | |
| Ashby, Clifford | Clifford Ashby | Designer | 1963 | 1 | |
| Ashby, Jeff | Jeff Ashby | Actor | 1970 | 3 | |
| Ashland, Camila | Camila Ashland | Actor | 1971 | 2 | |
| Ashley, Helen | Helen Ashley | Actor | 1902 | 1 | |
| Ashton, Ronald | Ronald Ashton | Choreographer | 1981 | 1 | |
| Asmis, Herbert | Herbert Asmis | Actor | 1933 - 1977 | 6 | |
| Aspan, Melanie | Melanie Aspan | Actor | 2001 | 2 | |
| Asperger, Grit | Grit Asperger | Actor | 1993 | 1 | |
| Assing, Christoph | Christoph Assing | Actor | 1990 - 1992 | 2 | |
| assistance, Choreographic | Choreographic assistance | | | | |
| Asso, Pierre | Pierre Asso | Actor | 1952 | 1 | |
| Asteroth, Gisela | Gisela Asteroth | Actor | 1953 | 1 | |
| Aston, Mary-Anne | Mary-Anne Aston | Costume Designer | 1981 | 1 | |
| Astrup, Henny | Henny Astrup | Actor | 1902 - 1908 | 10 | |
| Atherton, James | James Atherton | Actor | 1996 | 4 | |
| Atherton, Luke | Luke Atherton | Actor | 1996 | 4 | |
| Atkins, Simon | Simon Atkins | Actor | 2003 - 2021 | 2 | |
| Atta, Ansari | Ansari Atta | Adaptation | 1992 | 1 | |
| Atteck, Ana | Ana Atteck | Actor | 2006 | 1 | |
| Atzorn, Robert | Robert Atzorn | Actor | 1981 | 1 | |
| Audolenská, Eva | Eva Audolenská | Actor | 1976 | 1 | |
| Aukland, Snefrid | Snefrid Aukland | Actor | 1929 | 1 | |
| Aune, Arnulf | Arnulf Aune | Actor | 1983 | 2 | |
| Aurdal, Bent | Bent Aurdal | Actor | 1974 | 10 | |
| Avdjushko, Maria | Maria Avdjushko | Actor | 1995 - 2010 | 3 | |
| Aveling, Henry | Henry Aveling | Actor | 1882 | 1 | |
| Averill, Hope | Hope Averill | Actor | 2007 | 1 | |
| Avramov, Assen | Assen Avramov | Composer, Musician | 1997 - 2024 | 4 | |
| Axelsson, Amelie | Amelie Axelsson | Actor | 1901 - 1904 | 6 | |
| Axen, Bent | Bent Axen | Composer | 1985 | 1 | |
| Ayres, Elizabeth | Elizabeth Ayres | Actor | 2006 | 1 | |
| Azizjan, Marina | Marina Azizjan | Designer | 2005 - 2008 | 5 | |
| Azuma, Hanae | Hanae Azuma | Actor | 1912 - 1913 | 3 | |
| Azumaya, Saburo | Saburo Azumaya | Actor | 1918 - 1928 | 6 | |
| Anders Thorn, Niels | Niels Anders Thorn | Actor | 1994 | 1 | |
| Akesson, Hans | Hans Akesson | Lighting Designer | 1989 - 1991 | 3 | |
| Agarwal, Neeru | Neeru Agarwal | Actor | 1992 | 1 | |
| Ahmed, Hanat | Hanat Ahmed | Actor | 1992 - 1994 | 2 | |
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