Oprah Pours Margaritas for 'Wrinkle in Time' Cast at Wrap Party

Oprah knew exactly how to unwind at the end of shooting her new movie -- a little margarita mix and a lot of tequila.

O was in New Zealand Wednesday playing bartender for the cast and crew of "A Wrinkle in Time." Her co-star, Reese Witherspoon, seemed more than happy to let Oprah "get behind the tequila wheel!"

If the movie's half as good as this ... director Ava DuVernay's gonna score another hit.