Though Brody's physical transformation for 2002's The Pianist is obvious, the actor has also discussed the enormous mental and emotional strain of the role of Holocaust survivor pianist Wladyslaw Szpilman, for which he won the Academy Award for Best Actor in 2003.
To prepare, he told the BBC, he gave up his apartment, sold his car, disconnected his phones, and moved to Europe. But it was the emotional effect of starvation that he found the most surprising and difficult challenge to deal with.
"I've experienced loss, I've experienced sadness in my life, but I didn't know the desperation that comes with hunger," he said. There were moments when he wasn't sure he'd get out of the experience with his sanity intact, saying it took a year and a half "to settle back into things."