The stars in town for CinemaCon in Las Vegas.
Ben Affleck made a surprise appearance at Caesars Palace to promote the comic book movie titled "Justice League."
This was his first public appearance since announcing he completed rehab for alcohol addiction earlier this month.
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Actor Chris Pine also stopped by, sporting a new buzz cut. His next big role is in the new "Wonder Woman" movie.
CinemaCon is annual gathering of Hollywood's top studios to preview upcoming films.
