Here are what roles original Hairspray alums Ricki Lake and Marissa Jaret Winokur will have in Hairspray Live!

With a week to go until NBC’s highly anticipated Hairspray Live!, new details are emerging about the star-studded musical — including what roles Hairspray alums Ricki Lake and Marissa Jaret Winokur will have in the production.

The ladies — who originated the role of Tracy Turnblad in the 1988 John Waters film and in the 2002 Broadway show, respectively — first revealed to PEOPLE earlier this month that they’ll cameo in NBC’s live musical.

Though what exactly they’d being doing in the show was kept hush hush at the time, Harvey Fierstein — who plays Tracy’s mom Edna Turnblad — finally spilled the beans during an interview with Access Hollywood Live! on Tuesday.

“They’re going to be assisting when we get our big makeovers from Mr. Pinky,” the 62-year-old actor and playwright said.

Credit: Ramona Rosales © 2016

The scene to which Fierstein is referring happens during one of the musical’s many show-stopping numbers, “Welcome to the ’60s.” Tracy (newcomer Maddie Baillio) drags her agoraphobic mom out of the house and into a meeting with plus-size fashion boutique owner Mr. Pinky (Will & Grace alum Sean Hayes), who quickly gives both women larger-than-life new looks.

Winokur’s appearance will be a reunion with Fierstein, who originated the role of Edna on Broadway alongside her. Both won Tonys for their parts.

But moreover, the cameos will be full-circle moments for both Winokur, 43, and Lake, 48.

HAIRSPRAY, Ricki Lake, 1988
Credit: Everett

At 18 years old, Lake won the starring role of the plus-size optimist in Waters’ cult film and inspired a young Winokur to go for a career in Hollywood.

“I remember seeing the movie for the first time and thinking, ‘She’s doing it. I can do it too!’ ” Winokur previously told PEOPLE.

Winokur would in turn serve as inspiration for Nikki Blonsky, 28, who starred as Tracy in the 2007 movie based on the musical — and now Baillio.

“I think Hairspray is just as relevant today as it would have been in the ’60s, with segregation and body positivity,” the 20-year-old actress said. “That’s a huge thing now. I think this is a really great time for the show to come back.”

Hairspray Live! — with Jennifer Hudson, Arianna Grande, Martin Short, Kristin Chenoweth and Derek Hough — airs Dec. 7 at 8 p.m. ET on NBC.