EXCLUSIVE: Regina King on Directing Oprah Winfrey in 'Greenleaf': 'She Has Such a Warmth About Her'

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Regina King had the unenviable task of telling Oprah Winfrey what to do on the set of Greenleaf, but both of them were excited for the experience.

King won an Emmy last year as an actress in American Crime, and fans might also remember her from Ray and Enemy of the State. All of her experience in front of the camera proved helpful in remaining poised behind the camera while directing Greenleaf.

WATCH: Oprah Winfrey on Her Return to Acting in 'Greenleaf': 'It's So Good!'

"Today, I'm feeling confident," King told ET's Nancy O'Dell the day before she would be working with Lady O on the OWN original series.

As if King needed any more pressure, Winfrey acts in and executive produces the project, which means King was basically directing her boss.

"She has such a warmth about her," King said. "When Oprah comes to set, everyone just kind of feels the love like there's a hug."

Winfrey was equally looking forward to shooting with King.

WATCH: Oprah Winfrey Shares the Biggest Shock She Ever Had on 'The Oprah Winfrey Show'

"I'm kind of excited," she told ET.

The upcoming series centers on disillusioned preacher Grace Greenleaf (Merle Dandridge), who has returned home to her estranged family after 20 years. As she re-enters the world of Calvary Fellowship World Ministries, the Memphis megachurch run by her powerful parents: Bishop James Greenleaf (Keith David) and Lady Mae Greenleaf (Lynn Whitfield), it becomes evident that things are not as virtuous as they seem and that the family's outward display of faith hides sin and misdeeds.

Greenleaf airs Wednesday at 10/9c on OWN.