Jennie Garth is showing off a slim and trim bikini body months after ex-husband Peter Facinelli filed for divorce after 11 years.

The 40-year-old actress, who turns 41 on Wednesday, celebrated her birthday in Mexico last week with her three daughters, Luca, Lola and Fiona.

Garth looked incredibly toned in the two-piece pink bikini, after losing 30 pounds. She clearly had a great time, tweeting after the vacation, “”Home from @garzablancapvr Garza Blanca Preserve Resort & Spa. Had such a blast [sic]!!”

Garth shared how she lost 30 pounds last month with People magazine, stating that she enjoys exercising and has a gluten-free diet.

"Every day, I try to schedule something in, whether it's hiking with my dog or jogging or going to the gym.”

When asked why she lost the weight, the “90210” actress admitted, "I really feel like that part of me was dead and I need to shed it off. I got rid of the old and in with the new. A lot of exercising and a lot less eating. ... I decided to start taking better care of myself." 

Garth is currently dating Big Gigantic drummer Jeremy Salken while Facinelli is dating fellow actress Jamie Alexander.

Facinelli, 38, started dating Alexander, 28, after both starred in the movie, “Loosies,” which came out in January.

Garth seems to be at happy with her new man, saying about her new relationship, “I'm dating one guy right now. One is enough, right?"