She is also known for her performance in the 1998 production of The Beauty Queen of Leenane, for which she received a Tony Award for Best Actress in a Play.
"[2] Garry Hynes recalls meeting Mullen at Dramsoc at UCG in 1971, when they were both 17, and casting her in The Loves of Cass Maguire.
[5] She appeared on Broadway again in The Beauty Queen of Leenane in 1998, and won the Tony Award for Best Actress in a Play.
"[9] She also appeared in Tom Murphy's Brigit, presented by the Druid Theatre Company in 2014,[10] as "Mommo", the same character who is depicted in Bailegangaire.
New York Times reviewer Charles Isherwood wrote: "I should start by mentioning the indispensable contributions of Marie Mullen — the great and glorious Marie Mullen I can’t resist calling her — whom New York theatergoers will remember for her Tony-winning portrayal of the frustrated heroine of 'Beauty Queen.
[16] Mullen received the 2012 Alumni Award for arts, social sciences and Celtic studies from NUI Galway.