One of the major reasons Rebel Wilson is the perfect host for the MTV Movie Awards is because everyone is completely in love with her. How could they not be? She’s hilarious!

But during her appearance on The Tonight Show With Jay Leno, Rebel revealed that back in the day, there was one actor who wasn’t so warm and welcoming -– Russell Crowe. Actually, he was a complete jerk to our Rebel!

She explained how she won the "Nicole Kidman Scholarship" back in Australia for acting and flew to New York to study comedy. Later on, she ran into Nicole and Russell while they were having dinner in Syndey, Australia. After gathering up the courage to go and thank Nicole for the opportunity, Russell completely ruined it for her.

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“I went up to them but before I could say anything Russell Crowe turns to me and says, ‘F—k off!’” Rebel explained. “I just put my head down and walked away.” Well, chances are if they have a run-in again, he definitely won’t be acting that way towards one of the biggest stars in Hollywood!

Landing the hosting gig of the MTV Movie Awards is a huge honor that also brings a good amount of nerves along with it, as Rebel has learned. “I’m not used to doing live stuff because I’ve been doing so much movie stuff, and when you mess up you can do another take whereas the Movie Awards are 100 percent live,” Rebel explained on On Air With Ryan Seacrest. “So I have Sacha Baron Cohen and Sarah Silverman around last night to try to get some advice because they’re expert comedians and they said, ‘Just make stuff up!’”

We can all watch how Rebel does –- which will obviously be fantastic -– when the MTV Movie Awards airs live on Sunday, April 14th at 9/8c on MTV!

What do you think about Russell’s reaction to Rebel? Was he way out of line?