It took only 20 years for Kelly to finally pick Dylan!

Famed “Beverly Hills 90210” actors Luke Perry and Jennie Garth fell in love after they recently shot a television ad for Old Navy, according to a published report.

The couple acted like a pair of teenage lovebirds back at West Beverly Hills HS during the shoot.

“Since seeing Luke again, Jennie has fallen in love with him and Luke feels the same,” a source close to the couple told the National Enquirer. “There is an electricity between them that has been revived after all these years. It just happened.”

The source described how the pair sat next to each other, “and Luke immediately put his arm around Jennie and they talked like no one else was around.”

Teenage viewers were enamored for a decade with the prime-time drama as Garth’s Kelly Taylor had trouble picking between Perry’s bad boy, Dylan McKay, and Jason Priestly’s boy-next-door Brandon Walsh.

In real life, both Garth, 40, and Perry, 45, married others and had kids, but have since divorced.

Perry’s rep, Arnold Robinson, said the actors are, and always have been, nothing more than just best buddies.

Garth’s rep coule not be reached for comment.