16 Glee guest stars you forgot about
During its six-season run, Glee became famous for bringing in a parade of celebrity guest stars who could sing, dance, and bring their own special magic to McKinley High. While everyone remembers the big names like Gwyneth Paltrow and Neil Patrick Harris, the show actually featured dozens of other notable performers who made memorable appearances but somehow slipped from our collective memory.
From legendary comedians to Broadway powerhouses to pop icons, these guest stars brought their A-game to Lima, Ohio. Here is a list of 16 Glee guest stars you probably forgot about.
Helen Mirren
Yes, Dame Helen Mirren was on Glee, though you never actually saw her face. The Oscar-winning actress provided the voice for Becky Jackson’s inner monologue, giving the character’s thoughts a sophisticated British flair that was hilariously at odds with her teenage reality. Mirren later admitted she thought the casting directors chose her specifically because it was ‘the most absurd person they could think of’ for the role.
Adam Lambert
— Photo by bossmoss
The American Idol runner-up joined the cast in season five as Elliott ‘Starchild’ Gilbert, an aspiring performer who auditioned for Kurt’s band in New York. Lambert’s character became entangled in the group’s drama, offering Rachel a place to crash during her feud with Santana. His performance of Lady Gaga’s ‘Marry the Night’ was widely praised by critics and showed off his incredible vocal range.
Ricky Martin
— Photo by arp
The Grammy winner appeared as a Spanish teacher who helped Will brush up on his language skills during Spanish week. Martin’s character delivered a memorably steamy performance of LMFAO’s ‘Sexy and I Know It’ that had everyone questioning whether they needed to go back to school. His appearance highlighted just how questionable Will’s actual Spanish-speaking abilities really were.
Josh Groban
The acclaimed vocalist played a jerk version of himself, appearing as a guest judge at Regionals in season one. Groban had to serve one of the teachers a restraining order and generally act like a complete diva, which was the complete opposite of his real-life persona. He reprised the role in the season finale, proving that even nice guys can play convincing villains.
Tim Conway
— Photo by s_bukley
The comedy legend appeared alongside Billy Dee Williams and June Squibb in a season five episode where Kurt landed the title role in a retirement home production of Peter Pan. Conway got to perform Madonna’s ‘Lucky Star’ in what became one of the show’s more unexpected musical moments. The episode was actually written by Chris Colfer himself, who was clearly excited to work with such legendary performers.
Gloria Estefan
The Cuban-American superstar played Santana’s supportive mother, Maribel Lopez, first appearing in season three’s finale. As a real-life former glee club member and fan of the show, Estefan brought authentic warmth to the role, encouraging her daughter to pursue her dreams in New York City. She returned for Santana and Brittany’s wedding in the final season, proving that some TV parents actually stick around.
Whoopi Goldberg
The EGOT winner played Carmen Tibideaux, the stern Dean of Vocal Performance at NYADA who often appeared in the audience delivering harsh critiques to Rachel and Kurt. Every scene with Goldberg was television gold, as she brought her signature wit and gravitas to even the smallest moments. Her character served as a reality check for the overeager students trying to make it in the big city.
Carol Burnett
— Photo by s_bukley
The variety show legend played Sue Sylvester’s mother, Doris, in an emotional season two episode. Burnett joined Jane Lynch for a beautiful duet of ‘Ohio’ from the musical Wonderful Town, showcasing the softer side of Sue’s typically hard exterior. The performance highlighted Lynch’s incredible range while giving fans a rare glimpse into Sue’s family history.
John Stamos
— Photo by Jean_Nelson
The Full House star appeared as Dr. Carl Howell, Emma’s attractive dentist boyfriend who helped her overcome some of her OCD challenges. Stamos only got one solo number, but he made it count with a show-stopping performance of ‘What Happened to Saturday Night?’ during his audition for the school’s Rocky Horror production. His character ultimately helped Emma figure out that Will was her true endgame.
Demi Lovato
The pop star guest starred as Dani, a waitress at the Spotlight Diner who became Santana’s brief love interest in season five. Lovato’s most memorable moment came during her duet with Santana on ‘Here Comes the Sun’ in the diner after work, which led to their first kiss. While ‘Brittana’ was clearly endgame, Santana’s fling with Dani provided some sweet moments during their time apart.
Billy Dee Williams
The Star Wars icon appeared in the same retirement home episode as Tim Conway, playing a resident in the Peter Pan production. Williams brought his legendary smooth charm to the nursing home setting, proving that even Lando Calrissian could find new adventures in unexpected places. The episode became a showcase for veteran performers getting their moment to shine.
Jeff Goldblum
— Photo by arp
The Jurassic Park star played one of Rachel’s two dads alongside Broadway heavyweight Brian Stokes Mitchell. Their characters had a habit of turning family dinners into impromptu dinner theater performances, which was perfectly in character for Rachel’s dramatically inclined household. Goldblum brought his trademark quirky energy to the role, making every family scene feel like a mini-performance.
Charice
The Filipino singer played Sunshine Corazon, a McKinley transfer student who quickly became Rachel’s rival. Her powerhouse vocals threatened Rachel’s position as the school’s top female performer, leading to some serious drama between the two singers. Charice eventually transferred schools after Rachel’s competitive behavior became too much to handle, but not before showcasing her incredible range.
Kate Hudson
— Photo by Image Press Agency
The Almost Famous actress played Cassandra July, Rachel’s tough dance instructor at NYADA who seemed determined to break her spirit. Hudson delivered fierce performances of Lady Gaga’s ‘Americano’ and Chicago’s ‘All That Jazz,’ proving she could keep up with Broadway-level talent. Her character served as a harsh reality check for Rachel’s transition from small-town star to big-city student.
Molly Shannon
— Photo by SharpShooter
The Saturday Night Live veteran appeared as Brenda Castle, an astronomy teacher and badminton coach who had ongoing issues with substance abuse. Shannon’s character went head-to-head with Sue Sylvester in season one, creating some memorable comedic moments between two very different but equally intense women. Her performance showcased her ability to balance humor with more serious character flaws.
NeNe Leakes
The Real Housewives of Atlanta star guest starred as Roz Washington, the swim team coach who had her own unique approach to motivation. Leakes brought her larger-than-life personality to McKinley High, creating scenes that felt like reality TV had invaded the school’s halls. Her character added another layer to the show’s already colorful cast of faculty members.
When Guest Stars Made Glee Special
Looking back at these performances, it’s clear that Glee’s guest star strategy went far beyond simple celebrity cameos. The show consistently found ways to integrate major talents into meaningful storylines that enhanced the overall narrative. Whether they were playing themselves, fictional characters, or somewhere in between, these performers brought their own special energy to the halls of McKinley High and helped make the show the cultural phenomenon it became.
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