The parents, who are expecting a baby boy in July, celebrated the occasion with a lavish carnival-themed bash on April 28, reported the New York Daily News.
The intimate affair featured food stations that served lemonade, popcorn, hot dogs, french fries, snow cones, cotton candy, cupcakes, cookies and more.
"They had '70s and '80s music playing on the speakers. Everybody was having a great time being outside," a source said.
"Kids were swimming in the pool with a lifeguard watching, and many of them were swinging on swings and playing on a teeter totter," it added.