Originally published on ProWrestlingSheet.

Wrestling icon Rey Mysterio hung out with a celebrity Thursday in the 619 ... someone who's no stranger to fighting -- Chris Brown

Rey hit up Ad Nightclub in San Diego last night with fellow legend Konnan for Brown's "One Hell of a Nite" tour afterparty and posted a pic with the singer after meeting up.

The party was hosted by French Montana ... and they snapped a pic with him as well.

Brown was in the news this week after a woman claimed she was forcibly thrown off his tour bus because she refused to turn over her cell phone during a music video shoot.  Cops are looking to interview Chris and his group of friends who were there when the alleged incident went down.

These music video girls ain't loyal.