Oprah premiered OWN?s new religious soap opera titled ?Greenleaf? at the Tribeca Film Festival, which she?ll also star in, and spoke about why she?s undertaking faith and spirituality. The series is about a pastor?s family at a Tennessee megachurch, and how a tragedy makes all of them reckon with their faith and sins. It?s Winfrey?s first recurring role on a scripted series in two decades. Winfrey plays Aunt Mavis, the keeper of secrets and the family outsider, who recruits the help of the show?s faith-questioning protagonist, Gina, to help her bring it all to light. At the Tribeca tune-in screening, Winfrey told an excited crowd: ?Being able to do this show is a dream come true for me.?