| McDermid, Finlay | Finlay McDermid | Actor | 1928 - 1929 | 3 | |
| McDermott, Carolyn | Carolyn McDermott | Actor | 1993 | 1 | 1 |
| McDermott, Chris | Chris McDermott | Actor | 1969 | 3 | |
| McDermott, Gerard | Gerard McDermott | Actor | 2011 - 2023 | 3 | |
| McDermott, John | John McDermott | Designer | 2011 - 2022 | 2 | |
| McDermott, Lisè | Lisè McDermott | Actor | 1986 | 1 | |
| McDermottroe, Maria | Maria McDermottroe | Actor | 1984 | 1 | |
| McDevitt, Lorna | Lorna McDevitt | Actor | 2005 | 6 | |
| McDiarmid, Ian | Ian McDiarmid | Actor | 1980 - 2011 | 4 | 1 |
| McDonagh, Seán | Seán McDonagh | Actor | 2017 - 2020 | 2 | |
| McDonald-Lewis, Mary | Mary McDonald-Lewis | Director | 2007 | 1 | 1 |
| McDonald, Andrew | Andrew McDonald | Actor | 2007 | 1 | |
| McDonald, Antony | Antony McDonald | Designer | 1984 | 1 | |
| McDonald, Brian | Brian McDonald | Sound Designer | 2018 | 1 | |
| McDonald, Cat | Cat McDonald | Actor | 2025 | 1 | |
| McDonald, Cathy | Cathy McDonald | Actor | 1948 | 1 | |
| McDonald, Durward | Durward McDonald | Actor | 1961 | 1 | |
| McDonald, Flora | Flora McDonald | Actor | 1903 | 1 | |
| McDonald, Frank | Frank McDonald | Actor | 1971 - 1985 | 4 | |
| McDonald, H.A. | H.A. McDonald | Actor | 1928 | 1 | |
| McDonald, Hugh | Hugh McDonald | Actor | 1958 | 1 | 1 |
| McDonald, James | James McDonald | Dancer | 2014 | 1 | |
| McDonald, Katherine | Katherine McDonald | Actor | 1928 | 1 | |
| McDonald, Keegan | Keegan McDonald | Actor | 2015 | 1 | |
| McDonald, Kenneth | Kenneth McDonald | Actor | 1945 | 1 | |
| McDonald, Lois | Lois McDonald | Dancer | 1939 | 1 | |
| McDonald, Mat | Mat McDonald | Designer | 2024 | 1 | |
| McDonald, Neil | Neil McDonald | Actor | 2023 | 1 | |
| McDonald, Peg | Peg McDonald | Actor | 1958 | 1 | 1 |
| McDonald, Robin | Robin McDonald | Actor | 1979 | 1 | |
| McDoniel, Nancy | Nancy McDoniel | Actor | 1971 | 1 | |
| McDonnell, Cat | Cat McDonnell | Actor | 2010 | 1 | |
| McDonnell, Colleen | Colleen McDonnell | Actor | 2007 | 1 | 1 |
| McDonnell, Emily, Cass | Emily Cass McDonnell | Actor | 2013 | 1 | |
| McDonnell, Ian | Ian McDonnell | Actor | 2013 | 2 | |
| McDonnell, Mary | Mary McDonnell | Actor | 1974 - 1986 | 2 | 1 |
| McDonnell, Owen | Owen McDonnell | Actor | 2005 | 1 | |
| McDonnell, P.J. | P. J. McDonnell (P.J. McDonnell) | Actor | 1923 | 2 | |
| McDonough, Corinne | Corinne McDonough | Actor | 1911 | 1 | |
| McDonough, Emma | Emma McDonough | Designer | 2018 | 1 | |
| McDonough, J.M. | J.M. McDonough | Actor | 1998 | 1 | |
| McDonough, John | John McDonough | Actor | 1967 | 1 | |
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