Bring on diaper duty! Malin Akerman and husband Roberto Zincone are the very proud new parents of son Sebastian. After welcoming their first child on Tuesday, April 16, a source tells Us Weekly that the spouses of nearly six years are happily diving headfirst into parenthood.

"They are both so excited and are going to be incredible parents," the

Welcome back, Bryce Dallas Howard! The Help actress, now 32, hadn't walked a red carpet since November 2011, when she was in her last trimester of pregnancy with her second child, daughter Beatrice, born in January 2011. Looking slim and happy, the gorgeous, green-eyed redhead finally made her return at the Tuesday, April 17 premiere of Call Me

Bumpin' her way to the Emerald City?Kim Kardashianwas spotted heading into a studio in Hollywood on Wednesday, April 17 wearing a form-fitting green dress and matching heels.

Expecting her first child with boyfriendKanye West in July, the 32-year-old reality star proudly showed off her pregnancy curves in the snug maternity ensemble. Last month,

Edward Norton and his fiancee, Shauna Robertson, welcomed a healthy baby boy in March, multiple sources tell UsWeekly exclusively. The private pair got engaged in 2011 following a six-year courtship; Us broke the news of the Canadian film producer's pregnancy last month.

PHOTOS: What stars about love parenthood

The two are "thrilled and excited for