We can't substantiate rumors that Zac Efron and his 'Lorax' co-star Taylor Swift are linked romantically, but we do have proof that Efron practices safe sex. (Whew!)

Watch carefully, as Efron reaches into his pocket, and accidentally pulls out and drops a condom onto the red carpet at the Hollywood premiere of 'Lorax.'

The Dr. Seuss movie also stars Danny DeVito, and opens March 2nd.