We always knew Nicole Kidman was a feisty one.

Zac Efron went on Ellen today to promote The Paperboy and revealed his underwear dancing scene was all prompted by Nicole Kidman.

"Nicole is so amazing to work with. She also very improvisational and when she finds the character she can sort maneuver in and out of the lines," said Zac. "This was supposed to be a very serious scene. It was a sort of a intense dramatic moment for me. So I was very prepared to give my all in a dramatic moment and before I knew it music starts to turn up around me and she kind of looks at me and says you want to dance? And they’re still rolling so I can’t really say cut. And before I knew it we were improvising an entire dance in the rain."

Aw, we can just imagine little Zac-y poo getting all ready for his big serious scene and then getting Mrs. Robinsoned by Kidman.

If that's what it takes to get a shirtless Efron in tighty whiteys -- we'll take it.