- “Will & Grace” is on its final season, but even before it was rebooted the sitcom featured a ton of famous guest stars.
- Alec Baldwin once appeared on the show as a guy who was definitely interested in Karen.
- Musicians like Demi Lovato, Elton John, and Britney Spears also appeared on the sitcom.
- Visit Insider’s homepage for more stories.
After returning to NBC in 2017, the hit sitcom “Will & Grace” is now on its final season.
Here are all of the celebrities you forgot guest-starred on “Will & Grace.”
Madonna was almost Karen’s roommate.
In 2003, Madonna appeared on “Will & Grace” and was almost Karen’s new roommate.
While on “The Graham Norton Show,” Debra Messing, who plays Grace, said that Madonna sent her flowers after filming, but the singer was unsure of Messing’s name so the bouquet was addressed to Rachal.
Candice Bergen played herself.
Candice Bergen played herself in the series, but she was Karen’s (Megan Mullally’s) rival, with many references being made to the pranks she and the “Murphy Brown” actress would play on each other through the series.
Bernadette Peters played Karen’s sister.
On season eight, “Smash” star Bernadette Peters appeared as Karen’s little sister, Gin, who was injured as a child, so Karen supports her financially.
Even though Peters blamed Karen for her accident, she was actually the one who was trying to injure Karen.
Patrick Dempsey played one of Will’s love interests.
Long before he was McDreamy on “Grey’s Anatomy,” Patrick Dempsey appeared on the show during season three to play Will’s (Eric McCormack’s) boyfriend.
Alec Baldwin played a guy who was definitely into Karen.
Alec Baldwin is a popular guest-star choice for many NBC sitcoms – and “Will & Grace” is no exception.
On the original series, Baldwin played one of Karen’s love interests, and he even reprised his role in the revival a few years later.
Ellen DeGeneres played a nun.
On a season three episode called “My Uncle The Car,” Ellen DeGeneres played a nun who bought Grace’s uncle car – and had a dream of starting a cheesecake business of her own.
Natasha Lyonne worked for Grace.
Natasha Lyonne is known for playing Nicky Nichols on “Orange Is the New Black,” but on “Will & Grace,” she played Gillian, an intern who worked for Grace in her interior-design office.
Gene Wilder was Will’s boss.
Britney Spears played a pundit.
In 2006, Spears played Amber-Louise, a right-wing pundit on Jack’s (Sean Hayes’) talk show on OutTV who was actually secretly a lesbian named Peg.
Demi Moore was Jack’s childhood babysitter.
Demi Moore played Sissy, Jack’s babysitter as a child who, unsurprisingly, remained Jack’s babysitter well into adulthood.
Eventually, Will convinced Jack that he no longer needed a babysitter, so he had to let Sissy go, which was heartbreaking for him.
Matt Damon was Jack’s rival.
During season four, Matt Damon played Owen, Jack’s rival in the New York City Gay Men’s Chorus.
As The Telegraph pointed out, the show featuring Matt Damon was one of the series’ most-watched episodes of all time.
Elton John played a member of the “gay mafia.”
The legendary Elton John played a member of the “gay mafia,” and Jack thought that he (and the rest of the mafia, of course) was coming after him.
Kristin Davis was Vince’s version of Grace.
Former “Sex and the City” star Kristin Davis guest-starred on “Will & Grace” as Nadine, the best friend of Will’s boyfriend, Vince.
Unfortunately, she hated Will … and after she had the chance to get to know Grace better, it was obvious that she had ulterior motives.
Neil Patrick Harris was a “former gay man.”
During season two, Neil Patrick Harris played Bill, who identifies as a “former gay man” who tries to make Jack straight.
The episode mocked the disproven idea of “gay conversion therapy,” a topic later revisited in the revival.
Demi Lovato appeared on the reboot as a surrogate on the show’s reboot.
In 2020, the musician appeared as Jenny, a surrogate for Will. Her character lived in a sloppy apartment that Will simply could not stand.
Nick Offerman played a plumber.
Since he’s Megan Mullally’s real-life husband, Nick Offerman unsurprisingly and hilariously appeared on “Will & Grace” as Nick the Plumber.
He also guest-starred on the reboot, this time as Jackson Boudreaux, a celebrity chef.
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