08:43 PM EDT 10/16/2013
Originally posted 03/18/2013 02:30PM
George Clooney and Stacy Keibler had dinner with Matt Damon in Berlin on Saturday.
The trio dined at Grill Royal, a hot spot for celebrities in the area, where it looked like Clooney, 51, and Keibler, 33, "were together," despite rumors of a possible split, an onlooker tells PEOPLE.
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