Entertainment Movies Ben Affleck Makes Surprise Appearance at CinemaCon to Promote 'Justice League' Affleck, 44, was all smiles as appeared at his first public event since announcing he had completed rehab for alcohol addiction earlier this month. By Jodi Guglielmi Jodi Guglielmi Instagram Twitter Writer-Reporter, PEOPLE People Editorial Guidelines Published on March 29, 2017 08:29 PM Share Tweet Pin Email Photo: Matt Baron/BEI/Shutterstock Batman has arrived. To Justice League fans’ surprise and delight, Ben Affleck made a surprise appearance at CinemaCon Wednesday evening. Affleck, 44, was all smiles as appeared at his first public event since announcing he had completed rehab for alcohol addiction earlier this month. The actor joined the rest of the star-studded Justice League cast including Gal Gadot as Wonder Woman, Henry Cavill as Superman, Ezra Miller as The Flash, Ray Fisher as Cyborg, and J.K. Simmons as Commissioner Gordon. Alberto E. Rodriguez/Getty The group made a brief appearance on stage with director Zack Snyder, who was the only one to address the audience. “Justice League is the culmination of a journey for me that’s been seven years,” Snyder said as he introduced a clip from the film. “I’m a huge fan of these characters and this a dream come true to have a chance to bring them all together in this single film.” From Coinage: You Don’t Need Superpowers to be Batman–Just This Much Money On Tuesday, Affleck’s longtime friend Matt Damon said the actor was doing “fantastic” following his time in treatment. “He’s with the kids now, couldn’t be happier,” he said. “Jen’s working for a couple weeks in Atlanta, so he’s Mr. Mom-ing it right now. And that’s what he wants to be doing.” Justice League hits theaters on Nov. 17, 2017.