Deloris Van Cartier is a fictional character from the movie series Sister Act. She is portrayed by actress Whoopi Goldberg and is known for her vibrant personality and strong singing talent. In the story, Deloris is a lounge singer who witnesses a crime and is placed in witness protection at a convent, where her life takes an unexpected turn. At the convent, Deloris struggles to adapt to the strict lifestyle of the nuns but eventually helps them revitalize their choir. Her journey highlights themes of friendship, faith, and self-discovery, making her a beloved character in both the films and the stage adaptations.