Celebrity Parents It's a Boy for Rod Stewart Wife Penny Lancaster Stewart delivered their second son together, Aiden, on Wednesday By Rennie Dyball Published on February 17, 2011 12:00 PM Share Tweet Pin Email Photo: Ian Gavan/Getty Rod Stewart is singing one happy tune. He and his wife, Penny Lancaster Stewart, welcomed their second son together, Aiden, on Wednesday. He weighed in at 7 lbs., 12 oz. “Mother and baby are healthy and blissfully happy,” a rep for the couple tells PEOPLE. The new arrival also came just in time for Lancaster’s birthday – she turns 40 in March. PHOTOS: 2011: The Year of the Baby Aiden is the eighth child for Stewart, 66, and the couple’s second together – their elder son, Alastair Wallace, is 5. “We were thrilled and delighted to be able to tell Alastair that he was going to be a big brother,” the Stewarts said in August.