Jennie Garth celebrates 'Beverly Hills, 90210' co-star Tori Spelling's 50th birthday: 'Forever and always'

Jennie Garth recently celebrated pal Tori Spelling's milestone 50th birthday with a sweet message about their lifelong friendship.

Garth, 51, took to Instagram Tuesday to share then-and-now photos of the pair, who go all the way back to their days starring together on the TV series "Beverly Hills, 90210."

"Tori & Jennie or is it Donna & Kelly? 🤔," she wrote in the caption of the post, referencing their characters on the '90s teen drama. "It's both forever and always!"

"In my eyes we will always be these two teenagers...which explains why whenever we're together that's exactly how we act🤣LOL," Garth continued. "I can't wait until we're both in our rockers, like we always talk about, laughing & remembering (or not in my case) the good ol' days."

She ended her post with a promise to Spelling, writing, "I will love you until the end of time😘."

Garth and Spelling starred on "Beverly Hills, 90210" as Kelly Taylor and Donna Martin, respectively, for the show's entire 10-season run from 1990 to 2000.

The pair returned for the meta follow-up series "BH90210" in 2019, playing themselves, and started their podcast, "9021OMG," in 2020.