The two have been pals for several years now. In fact, Lowe recently posted a Vine video showing Efron celebrating the Fourth of July holiday with Lowe and his family. Fireworks and all!
Earlier this week, sources told E! News exclusively that Efron had actually gone through rehab about five months ago.
"He's healthy, happy and not drinking," one souce said. "He's taking time to focus on working."
At the Toronto International Film Festival, Efron attended the premiere of Parkland, his upcoming ensemble drama about the JFK assassination.
"I'm good, real good," he said.
(Originally published on Sept. 19, 2013, at 10:14 a.m. PT)
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