The former co-stars attended the Elie Saab fashion show and Rutherford brought her son Hermés along for a rare joint outing, too.

Kelly Rutherford made an appearance at Paris Fashion Week with her 18-year-old son Hermés on March 8. The 'Gossip Girl' actress — who is also mom to daughter Helena, 16 — has recently been making a series of public appearances with her son after many years out of the spotlight.

Leighton Meester and Kelly Rutherford's latest Gossip Girl reunion would surely have the approval of their characters, Blair Waldorf and Lily van der Woodsen. Meester, 38, and Rutherford, 56, sat together at the Elie Saab Womenswear Fall/Winter presentation at Paris Fashion Week on Saturday,