01:41 AM EDT 12/22/2014
Originally posted 09/05/2012 04:30PM
Bradley Cooper lives a relatively tame life these days, but that wasn't always the case.
The actor, 37, who stars alongside Zoë Saldana in The Words, has calmed down a lot since his 20s.
On one occasion, "I was at a party, and deliberately bashed my head on the concrete floor," Cooper recalls for the Hollywood Reporter in its Sept. 14 cover story. "Like, 'Hey, look how tough I am!' "
Top 5 Most Voted Stories
See The Dress That Got This Utah High Schooler in Trouble at a Dance
Bradley Cooper: Why American Sniper Was 'Life-Changing'
Broadway Legend Joel Grey Opens Up About His Sexuality
Rodrigo Alves Has Spent More than $250,000 to Look Like a Real-Life Ken Doll
American Sniper Hero Chris Kyle's Widow, Taya: 'I Will Love Him Until the Day I Die'
Top 10 News Categories
The most buzzed about stars this minute!
Treat Yourself! 4 Preview Issues
More On PEOPLE.com
Got a News Tip?
Send it to our People.com editors!