After being introduced, the two stars got on famously, a source tells PEOPLE.

By People Staff
Updated September 09, 2012 11:30 AM
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Jeff Vespa/Getty; George Pimentel/Getty

Kristen meets Katniss!

Kristen Stewart and Jennifer Lawrence hung out during the Toronto Film Festival on Saturday, where the actresses were at the Hotel Intercontinental promoting On the Road and Silver Linings Playbook, respectively.

“After being introduced, Kristen and Jennifer were soon chatting like old pals,” a source tells PEOPLE.

“They were so excited to meet each other,” the source says. The duo was joined by Bradley Cooper, Lawrence’s costar in Silver Linings Playbook.

Lawrence even invited Stewart to a party for Silver Linings Playbook at the Soho House later that evening.