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It'll soon be double the diapers for the actress and husband Brian Austin Green, who announced their second pregnancy in August. Baby number two joins the couple's 10-month-old son Noah Shannon, who was born last September – plus the big brother of the brood, Green's 11-year-old son Kassius. In the meantime, Dad should get some sleep! "I really felt young for my age until my new son was born. I've never felt so 40 in my life," he joked to Ryan Seacrest.
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Seeing double? Now 7½ and 6½, the pop star's cuties Sean Preston and Jayden James Federline could pass for twins, though they're separated by almost exactly a year (their birthdates are two days apart). The built-in playmates enjoy many perks of similar sibling-hood, like joint soccer games and gigs in mom's music videos.
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One month after daughter Hattie was born, Spelling got the unexpected news in 2012 that she was pregnant for the fourth time. "I was shocked, obviously," the actress and reality star told PEOPLE. Perhaps she shouldn't have been: On her post-baby relationship with husband Dean McDermott, she admitted, "I didn't want him to think that the sex was going downhill … So here you go. Here's four." But hey, more kids means more parties for the family, who welcomed son Finn Davey in August 2012.
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KERRI WALSH JENNINGS
The Olympian and mother of three explains that the 11-month separation between sons Joseph, 4, and Sundance, 3, was all part of the plan. "That's exactly how we wanted it," she blogged for PEOPLE about her timing. The decision was in part inspired by the volleyball player's close relationship with her own brother, 11 months her senior. "It was my dream to have our children so close to each other and I feel so grateful and humbled that the big guy upstairs blessed us with the realization of that dream," Walsh Jennings wrote. After a bit of a break, she and husband Casey Jennings welcomed daughter Scout Margery in April.
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The stork must like her! Seven months after the star delivered daughter Maxwell in May 2012, she and fiancé Eric Johnson confirmed that a sibling was on the way. "I was extremely shocked. I was shocked because I was going through a lot of hormonal changes trying to get back to the old, vibrant Jessica," quipped the Weight Watchers spokesperson, who lost 50 lbs. on the program after baby number one. But pregnancy number two was well worth it: Son Ace Knute was born just a little more than a year after his sister, on June 30, 2013.