Robert Pattinson met Rob Patterson at Hollywood's Chateau Marmont on March 23, 2013. Credit: Jason LaVeris/FilmMagic; Steven Lawton/FilmMagic

Mistaken identity! Robert Pattinson and near-namesake Rob Patterson finally came face-to-face on Saturday, March 23 when they bumped into each other at Hollywood's Chateau Marmont.

The 26-year-old Twilight actor and the 42-year-old guitarist (and Carmen Electra ex) shared a few laughs over Patterson always being confused for Pattinson.

"Rob was telling Rob from Twilight that everyone thinks he's him so they talked about it," a source tells Us Weekly. "Patterson told him how happy he was to finally meet Pattinson."

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The two were "hitting it off" until Patterson, who was previously engaged to Electra, wanted to capture their meet-up on camera and Pattinson declined.

"Rob from Twilight said, 'No, I don't like to take pictures. It feels like it takes a piece of my soul,'" the source recalls. "Everyone laughed at him and Rob Patterson was making fun of it all night."

After meeting Patterson, Pattinson headed back to girlfriend Kristen Stewart and pal Katy Perry -- his party guests for evening. Earlier that night, Stewart, 22, and Perry, 28, hung out together at the Nickelodeon Kids' Choice Awards and even posed for a silly picture with Stewart sitting on the "Wide Awake" singer's lap.