Photo: Raymond Hall/GC Images

NEW YORK, NY - DECEMBER 02: Actors Debra Messing and Billy Eichner are seen on set in Midtown on December 2, 2016 in New York City. (Photo by Raymond Hall/GC Images)

Billy Eichner’s upcoming romantic comedyBrosis groundbreaking in that the vast majority of the cast is made up of actors from the LGBTQ+ community.

One exception:Debra Messing, who appeared at the invitation of co-writer and star Eichner. “I was shocked and just so grateful that he reached out and was like, ‘We can’t do this without you. You have to be in this,'” theWill & Gracealum tells PEOPLE.

“When I read the script, I was even more excited because it’s really funny,” the 54-year-old continues. “But it’s also a very earnest, romantic comedy between two gay men. And it’s incredibly diverse. I think more diverse than any movie set I’ve ever been on.”

In the mix is Messing, who reveals her role to PEOPLE: “I playDebra Messing. A very heightened version, which was very, very fun to do,” says the actress, who promises nods toWill & Grace, but is mum on specifics involving her appearance.

RELATED VIDEO: Billy on the Street: “It’s Debra Messing, You Gays!”

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“And whileBrosmay be the first of its kind in several ways,” he continued, “my real hope is that it is only the first of many opportunities for openly LGBTQ+ ensembles to shine and show the world all we are capable of as actors, beyond just being the wacky sidekick, token queer or a straight movie star’s ‘gay best friend.'”

Brosopens in theaters nationwide Sept. 30.

source: people.com