The Cast of Beverly Hills, 90210 Pays Tribute to Shannen Doherty at a Reunion Event

The #BeverlyHills90210 reunion was FABULOUS! #RewindConChicago

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The cast of Beverly Hills, 90210 reunited over the weekend for RewindCon in Chicago, and Tori Spelling shared a sweet photo of herself with former costars Jason Priestly and Jennie Garth on Instagram on Monday. The actress, who famously played Donna Martin on the show (and is pregnant with her fifth child), held on to her growing baby bump as she posed next to Priestly and Grath, who portrayed Beverly Hills High School students Brandon Walsh and Kelly Taylor. Unknowingly, another star from the '90s popped up in the photo — *NSYNC's Joey Fatone photobombed the group, which Spelling alluded to in her caption, writing, "#WeWereFatoned."

Missing from the nostalgic event was Shannen Doherty, who played bad girl Brenda Walsh on the show; Doherty has been battling breast cancer since February 2015, and her costars took time to pay tribute to her during the panel. "[Doherty was] a very big part of the success of the show," said Luke Perry, who played Doherty's love interest Dylan McKay, adding, "None of us are up here today without Shannen. She's been through a lot. She's not doing well right now, but sometimes her contributions are minimized." Garth also posted a photo to Instagram of a breast cancer awareness sticker that read "Fight Like a Brenda."