Hugh Jackman tried to punch Russell Crowe as many times as possible during rehearsals for theatre production Les Miserables.
The Australian star keeps asking to re-shoot fight scenes where he knocks Crowe out, because he enjoys it so much.
A source told The Sun newspaper: "The crew find it hilarious as Crowe would obviously sweep the floor with Jackman in real life.
"Hugh keeps ribbing Russell and winding him up but he's been getting his own back by calling Hugh a twirlie, which is showbiz speak for a singer/dancer."
Although Jackman has always had to be in good shape to play muscular superhero Wolverine in the X-Men films, he was recently told he had to bulk up to play the character in the next movie, The Wolverine, as he had lost so many pounds while appearing in Hugh Jackman: Back On Broadway.
He said: "The studio wants me to bulk up. Singing and dancing makes the suits nervous because weight just falls off me, but I'd rather sing and dance on Broadway than make movies."
Crowe is also no stranger to long fight scenes, having undergone gruelling shoots against Michael Shannon in Superman: Man of Steel, in which he played the titular superhero's father.
He tweeted: "15km bike ride, umpteen hours fighting Michael Shannon. He's very hard to put down. Hard to tell who wins, we are still fighting tomorrow. (sic)"
- Bang! Showbiz