updated 05/10/2010 AT 9:00 AM ET
•originally published 05/10/2010 AT 10:50 AM ET
One thing he couldn’t conquer? His fear of ostriches.
“They would say, ‘Don’t make any noise around the ostriches. They’ll tear out your eyes and rip out your heart.’ So, I was naturally terrified,” Gyllenhaal, 29, said with a laugh at Sunday’s London premiere of the movie, which opens May 28 in the U.S. “They look like they’re innocent, but they’re really not.”