'Will & Grace' Stars Goof Around Behind the Scenes While Taping First New Episode

The "Will & Grace" reboot has officially started to film and Debra Messing, Megan Mullally, Sean Hayes and Eric McCormack all took to social media to commemorate the occasion.

"It's opening night!" Messing said excitedly in her Instagram video.

"Wooo on Broadway!" Mullally added. "Oh wait…"

"We're about to shoot it," Messing continued as she showed off the studio packed with crew and cameras.

Mullally also got in on the action and posted a video of her own starring her BFF Hayes.

"Tonight is our first taping," she said as Hayes silently mocked her in the background. "And Sean Hayes got fired at the last minute."

"What?!" Hayes responded.

Although the cast is just now turning the lights back on in the studio after being off the air for 11 years, the network has already greenlit a Season 2. And to make sure there is plenty of wiggle room for storylines, showrunners have said the revival will ignore everything that happened in the series finale.

In case you forgot, the finale showed the title characters' friendship falling apart and slowly reconciling over the span of about 20 years, as they married the men in their lives and had children, who eventually tied the knot with each other.

"When the decision was made to bring the series back, we were like, well, we left them with kids, right?” co-creator David Kohan said. "And if they have children, then it has to be about them being parents, 'cause presumably it would be a priority in their lives. And if it wasn't a priority in their lives, then they're still parents, they're just bad parents, right? We frankly did not want to see them being either good parents or bad parents. We wanted them to be Will and Grace."

"Will & Grace" premieres September 28 on NBC.