Photo: Evan Agostini/Invision/AP - Photo: John Shearer/Invision/AP
Tiffani Thiessen vs. Jennie Garth
The actresses met and shared many a scene during their days on "Beverly Hills 90210." But their rivalry started after Thiessen said that Garth and the "other girls" (Tori Spelling and Shannen Doherty) weren't that nice to her when she joined the cast. When the show ended a decade-long run in 2000, Thiessen and Garth became good friends -- so close that Thiessen admitted to being present for the birth of one of Garth's three daughters. That friendship, however, didn't last. The two women had a falling out over a still-mysterious situation that Thiessen has only explained by saying, "I was the one who was hurt, let's just say that. I was the one who was hurt." They are still not speaking, though Thiessen recently said, "It's water under the bridge. … I've moved on. I wish her well."