Mary Martha Byrne (born December 23, 1969 Ridgewood, New Jersey, USA) is an American actress, singer and television writer. She played the role of Lily Walsh Snyder on the soap opera As the World Turns from 1985 to 1989, then again from 1993 to 2008; as well as, from 2000 to 2003, Lily's twin sister, Rose D'Angelo. Byrne has also appeared in other stage, television and movie roles, including the title role in the 1983 film Anna to the Infinite Power. She is currently executive producer of the digital drama series Anacostia, where she has played the role of Alexis Jordan since 2011. Byrne has won three Daytime Emmy Awards for acting.