Sinéad de Vries was born in Capetown, South Africa on January 23, 1992. From the age of 5, Sinéad began appearing in national commercials for Kellogg's Corn Flakes, as well as modeling for the South African clothing brand, Ackerman's. Moving to America opened so many more doors for the young performer, and she began singing, acting, and dancing throughout her teen years. When Sinéad was 16, she signed with her first agency in Chicago. Sinead now lives in Los Angeles, working with her new agency out here, singing and acting. Sinead has starred as Cher in Clueless and Mary Warren in The Crucible onstage, and alongside film star Rob Riggle onscreen.

Sinéad has appeared on, and often hosted, many episodes of Movie Talk and TV Talk.