01/18/2011 AT 6:45 PM ET
What’s the secret ingredient to Susan Sarandon’s youthful looks and vigor?
“I drink light milk as often as I can,” Sarandon, 64, tells PEOPLE. “I have it in other ways like drinking it in coffee and I love ice cream. I highly recommend light milk.”
The Oscar winner, the latest celebrity spokesperson to don a milk mustache for the “Got Milk?” ad campaign, is also a UNICEF Goodwill Ambassador and says it was a “no brainer” joining the milk campaign.