'Beverly Hills, 90210' stars Jennie Garth and Tori Spelling reignite feud with co-star Tiffani Thiessen

You can't sit with us!

Former "Beverly Hills, 90210" stars Jennie Garth and Tori Spelling still have some strong feelings about co-star Tiffani Thiessen -- 17 years after their show ended.

Garth and Spelling appeared in a recent episode of "RuPaul's Drag Race" where they refused to say Tiffani's name while critiquing a drag queen who impersonated her "90210" character Valerie Malone.

"As Ti --, how do you say it?" Jennie said to the panel while offering some critique to the contestant.

"Just say: 'That which we don't speak of'" Tori suggested, which is an expression used to describe "Harry Potter" villain, Voldemort.

29 PHOTOS
Tiffani Thiessen through the years
See Gallery
Tiffani Thiessen through the years
SAVED BY THE BELL: THE COLLEGE YEARS -- SEASON 1 -- Pictured: (l-r) Kiersten Warren as Alex Tabor, Mario Lopez as A.C. Slater, Tiffani Thiessen as Kelly Kapowski, Mark-Paul Gosselaar as Zack Morris, Anne Tremko as Leslie Burke, Dustin Diamond as Screech Powers (Photo by Chris Haston/NBC/NBCU Photo Bank via Getty Images)
SAVED BY THE BELL -- Season 2 -- Pictured: (l-r) Mario Lopez as Alabert Clifford 'A.C.' Slater, Dennis Haskins as Mr. Richard Belding, Lark Voorhies as Lisa Turtle, Tiffani Thiessen as Kelly Kapowski, Elizabeth Berkley as Jessie Spano, Mark-Paul Gosselaar as Zachary 'Zach' Morris, Dustin Diamond as Screech Powers -- Photo by: NBCU Photo Bank
SAVED BY THE BELL: THE COLLEGE YEARS -- SEASON 1 -- Pictured: (l-r) Mario Lopez as A.C. Slater, Tiffani Thiessen as Kelly Kapowski, Dustin Diamond as Screech Powers, Mark-Paul Gosselaar as Zack Morris (Photo by Chris Haston/NBC/NBCU Photo Bank via Getty Images)
SAVED BY THE BELL -- Season 4 -- Pictured: (l-r) Mario Lopez as A.C. Slater, Mark-Paul Gosselaar as Zachary 'Zack' Morris, Leanna Creel as Tori Scott (front row) Lark Voorhies as Lisa Turtle, Dustin Diamond as Screech Powers, Tiffani-Amber Thiessen as Kelly Kapowski, Dennis Haskins as Mr. Richard Belding (back row) (Photo by Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)
SAVED BY THE BELL -- Season 2 -- Pictured: Tiffani Thiessen as Kelly Kapowski -- Photo by: Gary Null/NBCU Photo Bank
SAVED BY THE BELL -- Season 1 -- Pictured: Tiffani Thiessen as Kelly Kapowski -- Photo by: Alice S. Hall/NBCU Photo Bank
SAVED BY THE BELL -- Season 3 --Pictured: Tiffani Thiessen as Kelly Kapowski -- Photo by: Chris Haston/NBCU Photo Bank
SAVED BY THE BELL: HAWAIIAN STYLE -- Air Date 11/27/1992 -- Pictured: (l-r) Dennis Haskins as Mr. Richard Belding, Mark-Paul Gosselaar as Zack Morris, Tiffani Thiessen as Kelly Kapowski, Dustin Diamond as Screech Powers, Elizabeth Berkley as Jessie Spano, Lark Voorhies as Lisa Turtle, Mario Lopez as A.C. Slater -- Photo by: Joseph Del Valle/NBCU Photo Bank
Tiffani Thiessen (Photo by Jeff Kravitz/FilmMagic)
LOS ANGELES, CA - 1993: American actress Tiffani-Amber Thiessen poses for a portrait circa 1993 in Los Angeles, California. (Photo by Ron Davis/Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 792 -- Pictured: (l-r) Actress Tiffani Thiessen during an interview with host Jay Leno on October 27, 1995 -- (Photo by: Margaret C. Norton/NBC/NBCU Photo Bank via Getty Images)
Tiffani Thiessen (Photo by Gregg DeGuire/WireImage)
Jill Reno and Tiffani Thiessen during Golden Globes Style Lounge Presented by Kari Feinstein PR - Day 1 in Los Angeles, California, United States. (Photo by J.Sciulli/WireImage for Kari Feinstein PR)
LOS ANGELES - OCTOBER 18: Tiffani Thiessen attends T-Mobile Sidekick II Limited Edition Juicy Couture and Mister Cartoon Launch Party at T-Mobile Sidekick II City on October 18, 2005 in Los Angeles, California. (Photo by Chad Buchanan/Patrick McMullan via Getty Images)
Tiffani Thiessen at the Vegas Grand Prix Hosts a Star-Studded Charity Gala - April 5, 2007 at Bellagio Resort in Las Vegas, Nevada. (Photo by Bruce Gifford/FilmMagic)
PASADENA, CA - JANUARY 14: Actress Tiffani Thiessen poses for a picture at the Disney/ABC Television Group All Star Party held at the Ritz Carlton Hotel on January 14, 2007 in Pasadena, California. (Photo by Toby Canham/Getty Images)
BEVERLY HILLS, CA - JUNE 02: Actress Tiffani Thiessen attends the Ferragamo event with Debi Mazar and Adrian Grenier to benefit the L'Aquila earthquake victims at the Ferragamo Boutique on June 2, 2009 in Beverly Hills, California. (Photo by Donato Sardella/WireImage)
BEVERLY HILLS, CA - MAY 14: Tiffani Thiessen attends VANITY FAIR and USA NETWORK Celebrate 'CHARACTER PROJECT' With Opening Reception in Los Angeles at Ace Gallery on May 14, 2009 in Beverly Hills, California. (Photo by DAVID CROTTY/Patrick McMullan via Getty Images)
LOS ANGELES, CA - AUGUST 31: Actress Tiffani Thiessen attends the Nike+Human 10k race at the Los Angeles Coliseum on August 31, 2008 in Los Angeles, California. (Photo by Michael Buckner/Getty Images)
PASADENA, CA - AUGUST 5: Tiffani Thiessen arrives for the NBC Universal TCA Press Party at the The Langham Huntington Hotel & Spa in Pasadena, California on August 5, 2009. (Photo by Gregg DeGuire/FilmMagic)
NEW YORK - SEPTEMBER 13: Actress Tiffani Thiessen attends Rebecca Taylor Spring 2010 during Mercedes-Benz Fashion Week at Bryant Park on September 13, 2009 in New York City. (Photo by Duffy-Marie Arnoult/WireImage)
WEST HOLLYWOOD, CA - AUGUST 06: Actress Tiffani Thiessen attends the launch event for Gap's 1969 Jean Shop on Robertson Blvd at their 1969 Jean Shop on August 6, 2009 in West Hollywood, California. (Photo by John Shearer/Getty Images for Gap)
PASADENA, CA - AUGUST 5: Tiffani Thiessen arrives for the NBC Universal TCA Press Party at the The Langham Huntington Hotel & Spa in Pasadena, California on August 5, 2009. (Photo by Gregg DeGuire/FilmMagic)
NEW YORK, NY - MAY 25: Actress Tiffani-Amber Thiessen attends the 2011 FiFi Awards at The Tent at Lincoln Center on May 25, 2011 in New York City. (Photo by Andrew H. Walker/Getty Images)
NEW YORK, NY - MAY 02: Tiffani Thiessen attends the 2011 USA Upfront at The Tent at Lincoln Center on May 2, 2011 in New York City. (Photo by Michael N. Todaro/FilmMagic)
BEVERLY HILLS, CA - MARCH 07: Actress Tiffani Thiessen attends the Paley Center for Media's PaleyFest 2011 event honoring 'White Collar' at the Saban Theater on March 7, 2011 in Beverly Hills, California. (Photo by John M. Heller/Getty Images)
NEW YORK, NY - AUGUST 06: Tiffani Thiessen attends 2011 Kiehl's LifeRide for amfAR finale at Kiehl's Since 1851 Flagship Store on August 6, 2011 in New York City. (Photo by Rob Kim/FilmMagic)
NEW YORK, NY - JULY 19: Actress Tiffani Thiessen visits 'FOX & Friends' at FOX Studios on July 19, 2011 in New York City. (Photo by Astrid Stawiarz/Getty Images)
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"Yes, we know her as 'that which we don't speak of,'" Jenny said amid laughter from the judge's panel.

The stars of the show, which follows a group of teenagers through high school, college and eventually into adulthood, have openly talked about the feud in the past.

Thiessen joined "Beverly Hills, 90210" in its fourth season after Shannen Doherty left, and things were rocky between the actresses from the start. While speaking to Howard Stern in 2015, she revealed the females "were not very nice to me."

Tiffani then patched things up with Jennie after she apologized (for what, she didn't specify). Then the two had a falling out and they grew apart.

44 PHOTOS
Tori Spelling through the years
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Tori Spelling through the years
UNITED STATES - JANUARY 22: THE LOVE BOAT - Season Six - 1/22/83, Tori Spelling (Sarah) in the 'Doc's Big Case' episode of ABC's 'The Love Boat.', (Photo by ABC Photo Archives/ABC via Getty Images)
Candy Spelling and Tori Spelling at the Beverly Hilton Hotel in Beverly Hilton, California (Photo by Ron Galella/WireImage)
HOTEL - 'Barriers' - Airdate: March 11, 1987. (Photo by ABC Photo Archives/ABC via Getty Images) L-R: SHARI BELAFONTE;TORI SPELLING;CONNIE SELLECCA
Tori Spelling, 1988. (Photo by Michael Ochs Archives/Getty Images)
Tori Spelling (Photo by Jeff Kravitz/FilmMagic)
SAVED BY THE BELL -- Pictured: (l-r) Tori Spelling as Violet Anne Bickerstaff, Dustin Diamond as Screech Powers (Photo by Alice S. Hall/NBC/NBCU Photo Bank via Getty Images)
LOS ANGELES - 1990: Actress Tori Spelling poses for a portrait in 1990 in Los Angeles, California. (Photo by Harry Langdon/Getty Images)
Brian Austin Green and Tori Spelling (Photo by Ron Galella, Ltd./WireImage)
Jason Priestley, Tori Spelling, Aaron Spelling, Shannen Doherty and Luke Perry at the Universal Studios in Universal City, California (Photo by Ron Galella/WireImage)
Tori Spelling (Photo by Ron Galella, Ltd./WireImage)
Tori Spelling & Brian Austin Green (Photo by Jeff Kravitz/FilmMagic)
THE TONIGHT SHOW WITH JAY LENO -- Episode 647 -- Pictured: (l-r) Actress Tori Spelling during an interview with host Jay Leno on March 7, 1995 -- (Photo by: Margaret Norton/NBC/NBCU Photo Bank via Getty Images)
Tori Spelling (Photo by Jim Smeal/WireImage)
Tori Spelling at the Mann's Village Theater in Westwood, California (Photo by Steve Granitz/WireImage)
Tori Spelling during Planet Hollywood Beverly Hills Grand Opening at Planet Hollywood in Beverly Hills, California, United States. (Photo by Jim Smeal/WireImage)
Tori Spelling (Photo by Steve Granitz Archive 1/WireImage)
Brian Austin Green, Gabrielle Carteris, Joe E. Tata, Vincent Young, Ian Ziering, Jennie Garth, Luke Perry & Tori Spelling (Photo by Jeff Kravitz/FilmMagic, Inc)
Tori Spelling (Photo by Jim Smeal/WireImage)
Tori Spelling (Photo by SGranitz/WireImage)
Tori Spelling (Photo by SGranitz/WireImage)
Tori Spelling during Women With Heart Auction At Christies at Christie's in Los Angeles, California, United States. (Photo by Iris/WireImage)
Tori Spelling (Photo by Tony Barson/WireImage)
Tori Spelling during 'Sol Goode' DVD Release Party at Club 1650 in Hollywood, California, United States. (Photo by Jean-Paul Aussenard/WireImage)
Jamie Kennedy & Tori Spelling during Jamie Kennedy Book Release Party at Shelter in West Hollywood, California, United States. (Photo by Barry King/WireImage)
Tori Spelling and Jason Priestley during 'Silver Spoon Dog and Baby Buffet Benefitting Much Love Animal Rescue - Day One at Private Residence in Beverly Hills, California, United States. (Photo by Jean-Paul Aussenard/WireImage for Silver Spoon (formerly The Cabana))
Tori Spelling, engaged to Charlie Shanian, shows her new ring at the Hollywood & Highland in Hollywood, California (Photo by Gregg DeGuire/WireImage)
Tori Spelling during CA Boom Opening Night Extravaganza at Santa Monica Civic Auditorium in Santa Monica, California, United States. (Photo by Chris Polk/FilmMagic)
Tori Spelling (r) and husband Charles Shanian during 16th Carousel of Hope Presented by Mercedes-Benz to Benefit the Barbara Davis Center for Childhood Diabetes - Arrivals at The Beverly Hilton in Beverly Hills, California, United States. (Photo by Jeff Kravitz/FilmMagic)
NEW YORK - FEBRUARY 05: Actress Tori Spelling attends the Ann Bowen Fall 2005 show during Olympus Fashion Week at Bryant Park February 5, 2005 in New York City. (Photo by Thos Robinson/Getty Images)
Tori Spelling during American Eagle Outfitters 'Live Your Life' Awards Celebration at American Eagle Outfitters Flagship Store in New York City, New York, United States. (Photo by Jemal Countess/WireImage)
Tori Spelling during VH1 Big in '05 - Red Carpet at Sony Studios in Los Angeles, California, United States. (Photo by Jeff Kravitz/FilmMagic)
NEW YORK - MARCH 31: Tori Spelling (L) and Dean McDermott (R) attend Tori Spelling promoting her new VH1 scripted comedy 'So Notorious' at XL Lounge March 31, 2006 in New York City. (Photo by Amy Sussman/Getty Images)
Tori Spelling (Photo by Dimitrios Kambouris/WireImage)
Tori Spelling at Principessa during 2007 Silver Spoon Golden Globes Suite - Day 2 in Los Angeles, California, United States. (Photo by Matthew Simmons/WireImage for Silver Spoon (formerly The Cabana))
NEW YORK - NOVEMBER 09: Tori Spelling and Dean McDermott arrive at the 2007 Out 100 Awards at Cipriani Wall Street on Novemeber 9, 2007 in New York City. (Photo by Dimitrios Kambouris/WireImage)
LOS ANGELES, CA - NOVEMBER 09: Tori Spelling and daughter Stella at the launch of TotSpot.com sponsored by Little Tikes and benefiting Generation Rescue at the Treehouse Social Club. (Photo by Chris Polk/FilmMagic)
NEW YORK - FEBRUARY 19: Actress Tori Spelling poses backstage at Christian Siriano Fall 2009 during Mercedes-Benz Fashion Week at The Salon in Bryant Park on February 19, 2009 in New York City. (Photo by Steve Mack/FilmMagic)
WEST HOLLYWOOD, CA - FEBRUARY 27: Actress Tori Spelling arrives at the 19th Annual Elton John AIDS Foundation's Oscar viewing party held at the Pacific Design Center on February 27, 2011 in West Hollywood, California. (Photo by Frederick M. Brown/Getty Images)
HOLLYWOOD, CA - JULY 16: Actress Tori Spelling attends the 29th annual Gay & Lesbian Film Festival's premiere of 'Hoarders: Untold sTORI' at John Anson Ford Amphitheatre on July 16, 2011 in Hollywood, California. (Photo by David Livingston/Getty Images)
LOS ANGELES, CA - APRIL 21: Tori Spelling attends the 17th Annual Los Angeles Times Festival Of Books - Day 1 at USC on April 21, 2012 in Los Angeles, California. (Photo by Jonathan Leibson/FilmMagic)
BEVERLY HILLS, CA - MAY 10: Actress Tori Spelling and children Finn Davey McDermott (L) and Hattie Margaret McDermott attend The Helping Hand of Los Angeles' Annual Mother's Day Luncheon at the Beverly Hills Hotel on May 10, 2013 in Beverly Hills, California. (Photo by David Livingston/Getty Images)
NEW YORK, NY - JUNE 24: Tori Spelling attends the 'Mystery Girls' Screening hosted by The Moms at Park Avenue Screening Room on June 24, 2014 in New York City. (Photo by John Lamparski/WireImage)
CULVER CITY, CA - AUGUST 22: Tori Spelling attends the LG 'Fam To Table' series at The Washbow on August 22, 2015 in Culver City, California. (Photo by Jason LaVeris/FilmMagic)
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"I was the one who was hurt, let's just say that. I was the one who was hurt," Thiessen told Stern. "It's funny, our relationship started really rough and ended the way it started."

The bad blood between Tiffani and Tori happened over a cheating scandal. Tori cheated on her first husband, Charlie Shanian, with Dean McDermott in 2006. Charlie was a close friend of Tiffani's, and she revealed to Stern that "it was a hard situation for everybody."

Since then, Tiffani has made quite a career shift. She's left the petty drama behind and is somewhat of a lifestyle guru. She has a show on the Cooking Channel, "Dinner at Tiffani's."

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