The Superman Returns star wants to gain more experience performing before she takes the leap to appear on New York's Broadway or London's West End.
And she's viewing as many shows as possible to help boost her confidence so she can eventually swap movies for a stage role.
She says, "I would love to do some (theatre), either in the West End or on Broadway, but I am trying to get up the courage first by trying to see as many plays as I can.
"I think I am some way off going on stage. I hold theatre acting in such high esteem that it scares me.".