Kristen Stewart & Jennifer Lawrence Act 'Like Old Pals' in Toronto

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.

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“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.