Michaeleen O'Neil is an actress, best known for her work in theatre.

Theatre creidts include Mary in The Stick Wife (Horizons Theatre); Ruby in And Things That Go Bump in the Night (Woolly Mammoth Theatre); Marlene in The Little Playwright (Smallbeer Theatre); and Sister Mary Ignatius in St. Mary Ignatius Explains It All For You, Dr. Halbrech in Scotland Road, Anne in A Cry of Players, and Marion in Safe Sex (Source Theatre).