Madonna gets spanked by Jessica Chastain during concert in Prague

Jessica Chastain's 'Brave' New World

Jessica Chastain just can't keep her hands to herself!

The Oscar-nominated actress joined Madonna on stage during her Rebel Heart Tour Saturday night in Prague, and gave the star a spanking.

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While performing "Unapologetic Bitch," Madonna, 57, led Chastain up the middle of the stage before the actress showed off her killer dance moves. Madge then crawled on the dance floor in front of Chastain, 38, who unleashed several taps on the mega-stars bum.

"I gave Madonna a spanking & I've [got] a video to prove it," The Martian star wrote on Facebook, later sharing a picture of herself hand-in-hand with the "Bitch I'm Madonna" singer.

"The moment right before@madonna handed me a banana. The fkn Queen," she captioned the pic.

WATCH: Sean Penn's Daughter Dylan Reacts to Dad's Relationship With Madonna

The banana Chastain is referring to is the banana flask that Madonna has shared with a slew of celebrities she has welcomed on stage, including Amy Shumer and Katy Perry.

To see Perry get spanked by the Material Girl watch the video below.

Katy Perry Grinds on Madonna at Star-Packed L.A. Show

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