'I love you!': Jennie Garth congratulates her old Beverly Hills, 90210 co-star Tori Spelling, 43, on FIFTH pregnancy

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They played best friends in Beverly Hills, 90210, in the 1990s. 

And Jennie Garth was one of the first to congratulate Tori Spelling on her fifth pregnancy. 

The 44-year-old actress shared a black-and-white photo of the two on Thursday, which was sweetly captioned: 'Congrats to my beautiful friend #friends #bff #baby #iloveyou @torispelling.'

Friends forever: Jennie Garth was one of the first to congratulate Tori Spelling on her pregnancy

Jennie and Tori played best friends Kelly and Donna in the High School series. 

Tori, 43, announced the news in this week's issue of People magazine. 

The mother-of-four said: 'It was a total surprise. But we always wanted a big family. I’m really excited.'

Big family: Tori Spelling is expecting her fifth child with Dean McDermott - pictured in October 2015

'Dean was saying, "We just got Finn out of diapers; I thought we were in the clear!"' she added. 

'For the first time this year, they’re all in school. So it’s like, wow. We’re basically starting over.'

Tori and Dean, 49, are already parents to Liam, nine, Stella, eight, Hattie, five and Finn, four.

Dean also has an 18-year-old son, Jack, from his previous marriage.  

Screen stars: Tori (left) and Jenni (right) starred as best friends Donna and Kelly - pictured with Brian Austin Green

'This baby happened at the best time,'  Tori continues. 'Nothing is ever perfect, but I’m so madly in love with my husband and with our kids. The idea of adding to that is such a blessing.'

The news comes four years after Tori nearly died in childbirth after complications involving her pregnancy with Finn. 

The actress revealed during an interview with US Weekly that she was diagnosed with placenta previa at the 20 week mark of her pregnancy - a condition where the placenta covers the cervix and causes internal bleeding.

The star was rushed to hospital, where she spent 10 weeks receiving treatment followed by four months of bed rest, and she was even close to having her pregnancy terminated to save her life.

Married: The couple have bounced back from his cheating scandal - pictured in 2007

She battled through and gave birth to Finn Davey McDermott at the end of August that year.

Dean and Tori, who have starred in their own reality shows Tori & Dean: Inn Love, Cabin Fever and sTORIbook Weddings, have also faced problems in their marriage. 

Dean became embroiled in a cheating scandal back in 2013, which was documented in another reality show True Tori.

However, the pair underwent counselling, with the couple both reiterating their commitment to the marriage.

'You know, it's day by day and we're working really hard on our relationship,' Tori told Mario Lopez a year later. 'We're committed to each other as a family and you know it's a horrible thing that we went through, and we had to go through it publicly.' 

Wednesday's happy news came after it was revealed that Tori owes $37,981.97 to American Express after the creditor successfully sued the reality star for the overdue balance on her account.

American Express received a judgment for the full balance, plus interest, against the Beverly Hills, 90210 star after filing a lawsuit in January.