Fans Say '90210' Star Jennie Garth's 18-Year Old Lookalike Daughter Is a 'Little Kelly Taylor'

Jennie Garth's youngest daughter is all grown up.

The Beverly Hills, 90210 star, 52, took to Instagram on Oct. 4 to celebrate the 18th birthday of her daughter Fiona, and fans couldn't get over how much the teen looks like her mom, especially when she played Kelly Taylor.

In a series of photos and videos, Garth, Fiona, friends and family members (including Garth's ex-husband and Fiona's dad, Peter Facinelli) enjoyed a festive dinner in honor of the birthday girl at BOA Steakhouse on the Sunset Strip. In one clip, Fiona—wearing a tiara—clapped as desserts and sparklers were placed in front of her.

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"Because I just can’t believe this… Another Fiona love post.🤍Happy 18th Birthday to my beautiful daughter! 🎂 🤍It was so special to have everyone gathered around a big table for the first time in a long while, celebrating YOU and your amazing journey ahead. Your dad and I are beyond grateful for every moment. Here’s to all the adventures waiting for you! ❤️✨#HappyBirthday #FamilyLove@boasteakhouse" Garth captioned her post.

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Garth's followers raved about the mother-daughter pair in the comments.

"Oh my gosh; she’s your twin! So beautiful 💫" wrote one fan.

"It’s a little Kelly Taylor 😍can’t believe how much she looks like you! HBD 🥳" gushed someone else.

"Fiona is Kelly Taylor. Beautiful 😍" agreed a third Instagram user.

Several people praised Garth and Facinelli for their stellar co-parenting skills.

"So wonderful to see that a divorced couple can remain friendly and enjoy a meal together to celebrate their child. Wish more families of divorce could be like this. This is so much better for the kids involved," declared another commenter.

In addition to Fiona, Garth and Facinelli share daughters Luca Bella, 27, and Lola Ray, 21. Garth married her current husband, Dave Abrams, in 2015.

Next: Jennie Garth Says She Receives Messages from Luke Perry Amid Moments of Doubt