Zac Efron Went to Rehab for a Cocaine Problem

Actor Zac Efron arrives at the "Parkland" premiere during the 2013 Toronto International Film Festival at Roy Thomson Hall on September 6, 2013 in Toronto, Canada. Photo: Alberto E. Rodriguez/Getty Images

According to several tabloid reports, Zac Efron was in rehab about five months ago for what's being called a "serious" cocaine addiction. The drug use was apparently a problem on the set of Neighbors; Efron has already completed his treatment. His rep did not comment (not even to say, "Look how good we are at keeping secrets").