Divorce may be a dark comedy about the trials and tribulations of moving on from divorce, but it seems like the cast is all smiles behind the scenes. Stars Sarah Jessica Parker and Molly Shannon had a dance party turned dance-off on-set and shared it all on Instagram for us. Listening to the Sister Sledge hit “We Are Family,” the two start grooving from their chairs before completely busting a move.

Parker posted the video to Instagram, captioning it, “From our ‘scene’ and heard column on @divorceonhbo. Sister Sledge, ‘we are family’ while moving the camera takes on new meaning with @theofficialsuperstar. X, SJ.”

The fun didn’t stop when Parker went to shoot a scene for the second season of the HBO hit series. Shannon demonstrated her “robot” and “choo choo charlie” for the camera, proving that the SNL alum is a true superstar.

The duo also serenaded the Divorce crew, singing 1982 hit song “The Wings of Love’ by Jeffrey Osborne. Again, what became a soulful serenade from their chairs became a full fledged performance and we are *loving* it. Check out!

The HBO series follows Parker’s Frances and Thomas Haden Church’s Robert as they struggle through the slow demise of their marriage. Molly Shannon, Talia Balsam, and Tracy Letts also star as the couple’s friends, who are also dealing with the effects of Frances and Robert’s failing marriage.

While divorce is never fun, we love that the cast is having the time of their lives on set!