Just the mere mention of '90s primetime soap 'Beverly Hills, 90210' will get that infectious theme song stuck in your head. Dylan, Brenda, Kelly, Brandon and the rest of the original cast -- where are all of the actors who played them now?

Jason Priestley (Brandon Walsh)

Then: After previously appearing on '21 Jump Street' and 'Airwolf,' Jason Priestley played heartbreaker Brandon Walsh, who moves to Beverly Hills with his sister Brenda when their father gets a job transfer.

Now: After Priestley exited the cast in the ninth season, he stayed on as a producer and directed some episodes. He recently appeared on eps of 'Psych' and 'How I Met Your Mother.' In his free time he drives race cars and raises his two daughters with his wife, makeup artist Naomi Lowde.

Jason Priestley Beverly Hills 90210
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Shannen Doherty (Brenda Walsh)

Then: Doherty first made a name for herself in films like 'Girls Just Want to Have Fun' and 'Heathers' before signing on as the trouble-making Brenda Walsh on 'Beverly Hills, 90210.'

Now: Shannen left the show after only four seasons, going on to star in three seasons of the WB witchcraft series 'Charmed' before reprising her role as Brenda on the recent CW reboot, '90210.' After some messy personal travails, she's now married to Kurt Iswarienko, and their nuptials were chronicled on the reality series 'Shannen Says.'

Shannen Doherty Beverly Hills 90210
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Jennie Garth (Kelly Taylor)

Then: A then-unknown actress, Jennie Garth appeared on a single episode of 'Growing Pains' before nabbing the role of Kelly Taylor, the girl who goes from spoiled sexpot to mature and reasonable adult.

Now: Garth starred in several made-for-TV movies before reprising the role of Kelly on the new '90210' series on the CW. In 2012, she had her own reality show on CMT called 'Jennie Garth: A Little Bit Country,' and she recently divorced fellow actor and 'Twilight' star Peter Facinelli.

Jennie Garth Beverly Hills 90210
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Ian Ziering (Steve Sanders)

Then: Ian Ziering starred on the daytime soap 'The Guiding Light' before appearing on all 10 seasons of 'Beverly Hills, 90210' as popular rich kid Steve Sanders.

Now: Ziering has done some voice-over work for animated shows like 'Spider-Man: The New Animated Series' and 'Biker Mice from Mars.' He most recently appeared in the Adam Sandler and Andy Samberg comedy 'That's My Boy,' and he's currently in the midst of a stint as a Chippendale dancer in Vegas.

Ian Ziering Beverly Hills 90210
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Gabrielle Carteris (Andrea Zuckerman)

Then: After starring in some afterschool specials for ABC, Gabrielle Carteris caught her big break as bookish Andrea Zuckerman. Carteris starred on the show for five seasons, but came back later for guest appearances.

Now: Carteris has made appearances on several TV series, including 'Nip/Tuck' and, more recently, an episode of the sitcom 'The Middle.' She's also lent her voice to cartoons like 'Batman Beyond' and 'King of the Hill.'

Gabrielle Carteris Beverly Hills 90210
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Luke Perry (Dylan McKay)

Then: Perry played Dylan McKay, the loner with a sensitive side who starts to come out of his shell when he befriends the rest of the gang. Perry starred in the first five seasons, and then returned for the final two. Prior to joining the cast, he starred on the soap 'Another World.'

Now: His role on 'Beverly Hills, 90210' made him a total '90s heartthrob and earned him roles in the 'Buffy the Vampire Slayer' movie and the HBO drama series 'Oz.' Recently, he's appeared on episodes of 'Body of Proof' and 'Community.'

Luke Perry Beverly Hills 90210
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Brian Austin Green (David Silver)

Then: 'Knots Landing' star Brian Austin Green played David Silver, the uncool kid who works his butt off to become a part of the cool kid gang. And it works -- but he winds up leaving his BFF behind.

Now: Green starred in some made-for-TV movies, including 1995's 'She Fought Alone' opposite future 'Beverly Hills, 90210' star Tiffani-Amber Thiessen. He recently starred in the short-lived TBS comedy series 'Wedding Band' and appeared on a couple episodes of Charlie Sheen's show 'Anger Management.' He's married to actress Megan Fox; the pair recently welcomed a son.

Brian Austin Green Beverly Hills 90210
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Tori Spelling (Donna Martin)

Then: We saved the best for last. Tori Spelling, daughter of 'Beverly Hills, 90210' producer Aaron Spelling, played Donna Martin, the pure teen queen who doesn't want to have sex until she's married.

Now: After starring in some TV movies, Spelling went on to find success in the reality television game with 'So NoTORIous' and a string of shows with her husband Dean McDermott, with whom she has four children. But since Tori and Dean met and began their relationship while they were both still married to other people, they're tabloid staples (whether they want to be or not).

Tori Spelling Beverly Hills 90210
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