Jennie Garth Congratulates 'Beverly Hills, 90210' Co-Star Tori Spelling on Baby No. 5!

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Jennie Garth is beaming with joy!

The 44-year-old actress took to Instagram on Wednesday to congratulate her best friend and Beverly Hills, 90210 co-star, Tori Spelling, on her pregnancy.

WATCH: Tori Spelling and Dean McDermott Get Matching Tattoos for 10th Wedding Anniversary

"Congrats to my beautiful friend," she wrote. "#friends #bff #baby #iloveyou @torispelling."

The post came just a few hours after Spelling announced she was expecting her fifth child with husband Dean McDermott via Instagram. Spelling, 43, and McDermott, 49, are already parents to Liam, 9, Stella, 8, Hattie, 4, and Finn, 4. (McDermott also has an 18-year-old son, Jack, from his previous marriage to Mary Jo Eustace.)

WATCH: Tori Spelling Talks Rebuilding Marriage After Dean McDermott Cheated

On Friday, Spelling thanked her family, friends and fans for their well wishes, and shared a sweet pic of herself cradling her baby bump in a bright yellow dress.

"2nd Trimester #babybump & feeling great!" she wrote. "Thanks for all of the amazing love and support everyone has shown us with the news of #5! The comments and DM's and texts have been incredible! I ❤ all of you!"

Congrats to the happy couple!

WATCH: Tori Spelling Is Pregnant With Fifth Child

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