CALL it the Revenge of the Nerds!

After her divorce from actor Peter Facinelli, ex-“Beverly Hills, 90210” star Jennie Garth has found love with an Internet hotshot!

Sources say Jennie, 41, met San Francisco-based multi-millionaire Michael Shimbo, 38, through mutual pals, and their romance is heating up.

“Jennie is absolutely crazy about Michael,” said an insider.

“He’s a self-made guy who started out as a salesman at The Gap and went on to co-found a company called Concert TV in 2003. Michael sold the firm in 2009 for millions and didn’t have to work, but he took jobs with Live Nation and then Apple.”

Shimbo, who also founded an interactive video channel called Planes Trains + Automobiles, accompanied Jennie to a recent roast for actor James Franco.

AND the couple double-dated with Jennie’s former “90210” co-star Shannen Doherty.

Shimbo was also photographed with Jennie at her daughters’ soccer practice.

Amid talk of Facinelli, 39, cheating on Jennie, the two split. They both denied a third party was involved but their divorce was final in June. They’re parents of Luca, 16, Lola, 10, and Fiona, 7.

As The ENQUIRER reported, Facinelli – who starred in “The Twilight Saga” franchise – met actress Jaimie Alexander, 29, while they were filming “Loosies” in 2010. According to a source, they fell for one another in 2011 on the set of Showtime’s “Nurse Jackie,” and the two recently vacationed with his daughters in Cancun, Mexico.

“Although Peter’s happy that Jennie has found somebody, he’s a little jealous,” said the source. “Michael may not be Hollywood handsome, but he’s very successful.”