From pregnancies to rehab reveals, it's been another wild week in the celebrity world. In case you've been out of the loop -- or perhaps waiting in line for "The Hunger Games" movie tickets -- we've rounded up some stories you may have missed.

Reese Witherspoon is pregnant. Though the actress has not officially announced the happy news, several sources close to the actress spilled the beans to outlets including Us Weekly and People. This will be the first child for Witherspoon and her husband of one year, Jim Toth, though she has two children with her ex-husband, Ryan Phillippe.

Mike "The Situation" Sorrentino is in rehab. The hard-partying "Jersey Shore" star revealed he voluntarily opted to get treatment for a prescription pill addiction.

Ashton Kutcher is headed to space. Yes, you read that right. It was announced this week that the "Two and a Half Men" actor is Virgin Galactic's 500th customer.

Whitney Houston's cause of death was revealed. The L.A. County Coroner's report ruled her official cause of death as accidental drowning.

Hilary Duff is a mom! The actress and singer gave birth to a bouncing baby boy, named Luca Cruz, on March 20.

Gwyneth Paltrow threw on a skimpy red bikini during a trip to Porto Cervo Saturday. She was with her kids, Apple and Moses, and godfather Steven Spielberg and his wife Kate Capshaw for the Italian getaway. The group spent the day on the beach throwing a frisbee, paddle boarding, and swimming. Steven had his video camera out to capture the fun outing and Kate toasted Gwyneth with a cold drink during lunch in the shade. Gwyneth was a little more covered up in a maxi dress when she, Steven, and Kate headed into town later that evening to shop with Apple and Moses. Yesterday the whole crew hung out on Steven's yacht and Gwyneth even took Moses for a spin on a jet ski. Gwyneth's brother Jake also joined her for the family vacation, though her husband, Chris Martin, didn't attend since he was performing with Coldplay at a music festival in Scotland.