Jennie Garth and Tori Spelling Call Out Former Co-Star Tiffani Thiessen: 'That Which We Do Not Speak Of'

Jennie Garth and Tori Spelling Call Out Former Co-Star Tiffani Thiessen: 'That Which We Do Not Speak Of'

Jennie Garth and Tori Spelling Call Out Former Co-Star Tiffani Thiessen: 'That Which We Do Not Speak Of', Old grudges die hard! Jennie Garth and Tori Spelling threw some shade at their former Beverly Hills, 90210 co-star Tiffani Thiessen during RuPaul's Drag Race on Friday's episode.

The besties and longtime collaborators appeared as guest judges, where they took a not-so-subtle jab at Thiessen. 

After a parody sketch based off their '90s hit, Garth, 45, was critiquing contestant Aja, who played Thiessen's character Valerie Malone, and refused to even say Thiessen's name 

"As Ti… how do you say it?" Garth quipped, prompting Spelling, 43, to jump in, saying, "Just say, 'That which we don't speak of.'"

The pair laughed at the joke as the contestant looked shocked, and Garth said, "Yes, we know her as 'That which we don't speak of.'"

After getting off to a rocky start on 90210, Thiessen told Howard Stern in 2012 that she and Garth became "very good friends." But they once again had a rift later in life.

Jennie Garth and Tori Spelling Call Out Former Co-Star Tiffani Thiessen: 'That Which We Do Not Speak Of'

"We had a falling out and we grew apart," Thiessen said at the time. "I was the one who was hurt, let's just say that."

Thiessen also revealed that Spelling's 2005 split from her first husband when she met current husband Dean McDermott led to the end of their friendship.

"It was a hard situation for everybody. We were close with Charlie [Shanian]… my best friend was Charlie's roommate. It was hard," Thiessen told Stern of Spelling's first husband.

MSN