She looked a hundred times different to the Theron who did the rehearsal the night before.
On Saturday night, Theron, wearing just heels and jeans and no make-up, practiced her lines and angles for the camera.
Chatting with a producer, she said, "Well, I'm not wearing underwear."
The loudspeakers roared into life as a director barked: "Too much information!"
Theron, who has her own Oscar laughed it off.
"I didn't realize everyone could hear me," she said, before thanking the crew and waving goodbye."