Zellweger, 50, who took home the SAG Award for her performance as Judy Garland in Judy, shared a laugh with Zeta-Jones, 50, backstage at the show. The pair were also photographed chatting with nominee Jennifer Lopez.
Back in 2003, both ladies won SAG Awards for their performances as Roxie Hart and Velma Kelly, respectively, in the musical adaptation. Zeta-Jones also went on to win the Oscar for the same role.
This year, Zeta-Jones attended the show in support of her husband, Michael Douglas, who was nominated for his work on The Kominsky Method.