Jennie Garth
turns 40 today -- and she's starting this year as a single woman.

The former star of "Beverly Hills, 90210" recently announced she and her husband of 11 years, "Twilight" star Peter Facinelli, are divorcing.

Jennie's co-stars Tori Spelling and Tiffani-Amber Thiessen served as bridesmaids at the couple's 2001 wedding, which was held 7 months after the "90210" series finale aired.

Her divorce and her life as a single mom will be chronicled on the upcoming reality show, "Jennie Garth: A Little Bit Country," which premieres April 20 on CMT.

But what have Jennie's co-stars Tori, Tiffani, Luke Perry, Jason Priestley and the rest of the cast been up to since the show went off the air?

Check out the gallery above to see what they look like now and what they've been working on!

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