After leaving 90210 in 1998, Jason Priestley turned his attention behind the camera as well as in front, beginning a career as a director as well as an actor. A short-lived racing career ended after a horrible 2002 crash left him in critical condition. But, he recovered, and continues to act and direct. He married makeup artist Naomi Lowde in 2005, and the couple has 2 kids, Ava and Dashiell.
After her well-publicized departure from the show in 1994, Shannen Doherty continued to act, starring in another Aaron Spelling series in 1998, Charmed, from which she was also let go in 2001. Additionally, she made an appearance on the 90210 reboot. She is still acting, though less frequently, and has since married in 2011 to Kurt Iswarienko. She was diagnosed in 2015 with breast cancer, but is continuing to fight it.
After the show ended, Jennie Garth continued to act. She starred in The WB's "What I Like About You" with Nickelodeon star Amanda Bynes. She also made a return to the reboot of 90210 and appeared in the 5th season of "Dancing with the Stars". She married actor Peter Facinelli, with whom she had had a daughter, in 2001. The couple then had 2 more daughters before divorcing in 2012. She married a third time on July 11, 2015 to actor Dave Abrams, and lives with him and her 3 girls(Luca, Lola, and Fiona) in central California.
Since the show ended, Ian Ziering has continued acting, even lending his voice to Spider-Man. His most current claim to fame is the Syfy cult classic "Sharknado", in which he starred in 2013. He is married to Erin Ludwig since 2010, and currently has 2 daughters, Mia and Penna.
After leaving the show in 1995, Gabrielle Carteris hosted her own talk show, which lasted one season. She continues to act and has been vice president of the Screen Actor's Guild since 2012, and was elected president in 2016 following actor Ken Howard's death. She has 2 daughters with her husband Charles Isaacs, whom she married back in 1992.
Since the show went off the air, Luke Perry has continued to act occasionally, currently starring in CSI: Cyber. He was married to Minnie(Rachel) Sharp, whom he divorced in 2003 and now the two share custody of their 2 kids, Jack and Sophie. He starred in Riverdale, The CW's remake of the Archie comics. On March 4, 2019, Perry passed away after suffering a massive stroke. He was 52 years old.
Brian Austin Green has continued to work regularly in acting since the show's finale, most recently appearing on Anger Management. He has a son with former 90210 costar Vanessa Marcil, and has since gotten together with Megan Fox, with whom he has 3 sons, Noah, Bodhi, and Journey.
Still acting, but not as often,Tori Spelling(daughter of TV mogul and 90210's producer Aaron Spelling) is now more known for her personal life and event planning empire than her acting. She has been married to actor Dean McDermott since 2006 and had 4 children together: Liam, Stella, Hattie, and Finn. The two began experiencing marital problems which were, like everything else in her life, televised in 2012 in the show True Tori. She and McDermott have since reconciled. They welcomed their fifth child, Beau, in 2017.