Angelina Jolie and Brad Pitt
01/09/2012 at 06:00 AM EST
What's Brad Pitt
's newest accessory?
A cane – and it's not just for show.
The actor, 48, walked the red carpet at the 23nd annual Palm Springs Film Festival awards gala with the cane on Saturday, and told reporters he has an injured ACL
, a ligament in the knee that connects the femur with the tibia.
"I was carrying my daughter [Vivienne] down the hill and I slipped," Pitt said. "It was either her or me."
Though Pitt says he won't need surgery, he may need that cane for a while.
Not that his partner, Angelina Jolie
"I like the cane," she told reporters on the carpet Saturday, adding that the injury hasn't slowed him down much at all. "He's not that kind of guy. He does everything still."
Jolie also said that Vivienne, 3½, wasn't hurt in the tumble.
"Vivie's okay," she told reporters. "She was absolutely fine."
Reporting by SCOTT HUVER