It's the fifth child for the actress, who is best known for starring in 80's films such as Rocky IV, Beverly Hills Cop II and Cobra.
She posted a photo of her baby bump and wrote, "Family getting larger #me #family #brigittenielsen #babybump".
USA states declare emergency ahead of subtropical storm
Steady weakening is expected after landfall, and Alberto is forecast to become a tropical depression Monday night or Tuesday . Authorities in Florida's Franklin and Taylor counties issued mandatory evacuation orders for thousands of coastal residents.
She later shared a second photo that showed the happiness and "positive vibes" she's feeling.
She appears to be about eight months pregnant. She's already the mom to four sons - Raoul Meyer Jr. Brigitte wore a pink rose tiara for the beach-side ceremony, with both she and her new husband jumping into the hotel pool immediately after saying "I do".
Nielsen has been married to Italian TV producer Mattia Dessi since 2006.
Red Sox to part ways with Hanley Ramirez
Meanwhile, the man the Sox traded to get him, Travis Shaw, has 42 home runs and 132 RBI in 193 games for the Brewers . With the highest payroll in the game - $66 million higher than the Yankees! - they can afford mistakes.
"On Friday, the star posted an adorable throwback to Instagram - showing a rare insight into three of her sons" early years.
Nielsen had a very public battle with the bottle after her 1987 divorce from Stallone - they were married just two years - and she was most recently in rehab in 2007.
This is Brigitte and Mattia Dessi's first kid together. Nielsen also dated Flavor Flav in 2005 after meeting him on "The Surreal Life".
FSU beats Louisville 11-8 in 10 innings for ACC title
The top eight seeds and regional pairings will be announced during the NCAA's baseball selection show Monday at 11 a.m. on ESPNU. It had been almost two decades since an Atlantic Coast Conference team won back-to-back ACC Baseball Tournament championships .
Not only is this Brigitte's fifth pregnancy, but she's also been married five times, so maybe 5 is her lucky number!