From Wikipedia, the free encyclopedia. Molly C. Quinn (born October 8, 1993, height 5 5 (1,65 m)) is an American actress whose works have included theatre, film, and television. Since March 2009, she has played Alexis Castle, the main characters daughter, in ABCs Castle. Life and career Quinn is of Irish descent and was born in Texarkana, Texas. She began taking weekly acting lessons from retired director and producer Martin Beck after performing in her communitys performance of The Nutcracker at age six. In the sixth grade, she auditioned at the Young Actors Studio where she performed for the programs director, Linda Seto, and representatives from the Osbrink Talent Agency. After six months of intensive [acting] training, Quinn signed a contract with the Osbrink agency. Subsequently, she signed with Management 360.