OWN has released the season 4 trailer for its hit megachurch drama, Greenleaf. The series returns to OWN on September 3. Here's the official description for the new season: Season four finds the Greenleafs attempting to maintain a united front in the face of losing Calvary to Bob Whitmore (Beau Bridges) and Harmony & Hope Ministries, but secrets past and present create what could be fatal fractures in the family's fragile foundation. Lady Mae (Lynn Whitfield) and Grace (Merle Dandridge) form an uneasy alliance as they endeavor to reclaim their church from Harmony & Hope -- Grace from within the church where she's operating as interim head pastor and Lady Mae using her persuasive ways from the outside. But Grace's mission becomes complicated when a mysterious phone call sets in motion a chain of events that threatens to reveal her biggest secret yet. The Bishop (Keith David) continues working to mend his rift with his wife Lady Mae, while day by day Harmony & Hope's grip on Calvary tightens.

The series also stars Desiree Ross, Lamman Rucker, Deborah Joy Winans, Rick Fox, Tye White, Kim Hawthorne and Lovie Simone. Greenleaf is produced for OWN by Lionsgate in association with Harpo Films and Pine City. Executive producers include Oprah Winfrey, Craig Wright, Clement Virgo and Kriss Turner Towner.

Watch the trailer below: READ MORE: Exclusive: Grace Questions Lady Mae In This Week's 'Greenleaf' Episode Madonna or Jezebel? 'Greenleaf' Traps Its Teen Girls In A Tired Trope 'Reel It Back:' Lynn Whitfield Reacts To Some Of Her Most Iconic Film Scenes Over The Years Photo: OWN