The Office cast reunites for hilarious short film about creating a new business

The Office fans were treated to a slice of nostalgia after the cast reunited as part of a hilarious skit for AT&T Business.

More than 10 years after we bid goodbye to the iconic show, the sitcom favourites have traded paper for pillows in the familiarly chaotic clip, with the likes of Rainn Wilson and Jenna Fischer joining in on the fun.

During the six-minute skit, Wilson − who played Dwight Schrute in the hit series − decides to launch his own business venture, roping in his former colleagues Craig Robinson (Darryl), Creed Bratton (Creed), Kate Flannery (Meredith) and Brian Baumgartner (Kevin) to help him set up his brand new company, Sleep with Rainn. Watch the chaos unfold below:

His big idea is an innovative piece of tech that lulls people to sleep using the sound of Rainn's voice. What could go wrong?

Well, of course, things don't exactly go smoothly as the opening day proves to be delightfully chaotic as Robinson loses the key to the room which houses the computer needed for the big website launch.

Eventually the gang manage to bust their way in the room with just minutes to spare.

Speaking about taking part in the ad, Fischer − who starred as fan fave Pam Beasley − told USA Today: "I felt like we were on the set for 30 seconds and we were all back clicking with our chemistry.

Fans were treated to a cast reunion. (AT&T Business)

"We didn't even have to really even talk about it. We all just got in our lanes.

"The show ended so beautifully, that I hate to open it back up again, and mess it up. So this was the sweet solution. We get to come together and work together," she added.

While there were plenty of familiar faces in the skit, there was a new addition in the form Peach the Pug, who sadly lost her ball in the building.

Joking about working with the pooch, Baumgartner said: "We needed more takes because of the pug than any of my other coworkers. Except maybe Creed."

Meanwhile, towards the end of the skit, there's a blink and you miss it feature of another Dunder Mifflin alumnus.

Rainn Wilson and Jenna Fischer were among those featured. (AT&T Business)

As Chief Technology Officer, Craig creates makeshift armour from pillows to bulldoze his way into the computer room, it turns out that his stunt double was actually Calvin Tenner, who you may remember played warehouse worker Glenn in the TV show.

"We had another cast member there, as well. Nobody saw his face but yeah, he did the heavy lifting for Craig," Baumgartner added.

Fans have been desperate for more of The Office US ever since Dunder Mifflin closed its doors in 2013, with director Paul Feig previously telling Metro that he wouldn’t be on board for a reboot unless the whole cast was involved.

You can check out 'Sleep with Rain' here.