Actors Who Over-Prepared For Their Roles And Others Who Really Dropped The Ball
Underprepared – Hugh Jackman, X-Men
When the first film in the X-Men franchise went underway, Dougray Scott was originally cast as Wolverine. A few weeks into filming, he was replaced by Hugh Jackman, a vastly underprepared actor who had never even read one of the comics!

Twentieth Century Fox
Twentieth Century Fox
On top of that, Jackman was not in “Wolverine shape,” something he says he might have “overpromised” the studio when he was offered the role.