Mean girls! Jennie Garth and Tori Spelling reignite feud with former 90210 costar Tiffani Thiessen and refuse to speak her name

It has been 17 years since they last shared the screen together on Beverly Hills, 90210. 

But the drama continues off-air for former stars Tori Spelling and Jennie Garth, who traded catty comments about alum Tiffani Thiessen.

The actresses made an appearance on RuPaul's Drag Race and refused to utter Tiffani's name when they critiqued a drag queen who parodied her character Valerie Malone in a competition segment.

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Cat's got their tongues! Tori Spelling and Jennie Garth refused to say their Beverly Hills, 90210 costar Tiffani Thiessen's name during an appearance on RuPaul's Drag Race
Cat's got their tongues! Tori Spelling and Jennie Garth refused to say their Beverly Hills, 90210 costar Tiffani Thiessen's name during an appearance on RuPaul's Drag Race

Cat's got their tongues! Tori Spelling and Jennie Garth refused to say their Beverly Hills, 90210 costar Tiffani Thiessen's name during an appearance on RuPaul's Drag Race

Drama queens! Tiffani Thiessen has said Jennie Garth and Tori Spelling 'were not very nice to me' when she joined the series in 1994

Drama queens! Tiffani Thiessen has said Jennie Garth and Tori Spelling 'were not very nice to me' when she joined the series in 1994

'As Ti -, how do you say it?' Jennie said to the panel while guest judging a contestant's performance in a parody competition. 

Tori offered up a suggestion that was stinging, 'Just say: "That which we don't speak of,"' - an opaque nod to an expression used to describe the villain in the Harry Potter series, Voldemort.

L-R: Beverly Hills, 90210 cast photo; Ian Ziering, Jason Priestley, Mark D Espinoza, Tori Spelling, Gabrielle Carteris, Jennie Garth, Luke Perry, Tiffani Thiessen, Brian Austin Green

L-R: Beverly Hills, 90210 cast photo; Ian Ziering, Jason Priestley, Mark D Espinoza, Tori Spelling, Gabrielle Carteris, Jennie Garth, Luke Perry, Tiffani Thiessen, Brian Austin Green

Falling out: Tiffani revealed that she had a falling out with Jennie after becoming friends

Falling out: Tiffani revealed that she had a falling out with Jennie after becoming friends

'Yes, we know her as "That which we don't speak of,"' Jennie continued as a roar of laughter spilled from the panel. 

The mockery stunned the contestant, whose jaw dropped.

Tiffani joined Beverly Hills, 90210 in 1994 in its fourth season after Shannen Doherty exited. Speaking to Howard Stern in 2015 on his radio show, Tiffani said the females 'were not very nice to me' from the very start. 

Tensions eventually eased and she became friends with Jennie after she 'actually apologized,' she shared, and they attended each other's weddings.

Hot topic: Tori Spelling, Michelle Visage, RuPaul, Carson Kressley and Jennie Garth judged a group of drag queens who parodied the teen soap opera

Hot topic: Tori Spelling, Michelle Visage, RuPaul, Carson Kressley and Jennie Garth judged a group of drag queens who parodied the teen soap opera

Stunned: A drag queen contestant who portrayed Tiffani's character Valerie Malone reacted dramatically to Jennie Garth's remarks

Stunned: A drag queen contestant who portrayed Tiffani's character Valerie Malone reacted dramatically to Jennie Garth's remarks

Eventually, things took a turn for the worse. 'We had a falling out and we grew apart,' she explained 'I was the one who was hurt, let's just say that. I was the one who was hurt.' 

She added, 'It's funny, our relationship started really rough and ended the way it started.'

Things went sour with Tori after the blonde cheated on her first husband, Charlie Shanian, who was Tiffani's friend, for Dean McDermott in 2006.

'It was a hard situation for everybody,' she said on the program at the time. 'We were close with Charlie ... my best friend was Charlie's roommate. It was hard.'

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