Grace's first major acting role was as Miss Mull in Custer's Last Stand Up, a BAFTA-winning children's television series, and she later acted in a range of Irish domestic and international releases, including work with Jim Sheridan.
[1] She is best known for her role in David Gordon Green's comedy fantasy film Your Highness.
[citation needed] Grace-Cassidy has been a regular panelist with Midday, later renamed The Elaine Show, on TV3, now Virgin Media One, since 2012.
[2] She has written eight short films: Princess Rehab (2013), Galway Fleadh-winning I AM JESUS (2014), Torn (2014), Even Droids Have Friends (2015), Cineuropa Award-winning Love At First Light (2015), Blackbird (2016), Reach (2017), and Run (2019).
She is the co-writer of The Quiet Woman, which is currently in development with Park Films, supported by Screen Ireland.