Another Boy for the Shriver Family!
07/02/2009 AT 01:35 PM EDT
"I am so blessed and grateful for my family to welcome our new son into this world,” Shriver, 43, Founder and Chairman of Best Buddies International, tells PEOPLE, adding of 44-year-old Alina, "Women are miracle workers."
John Joseph Sargent Shriver weighs 7 lbs., 9 oz. and is 20.5 inches long. He is the Shriver family's fifth child, joining Teddy, 20, Eunice 15, Francesca,14, and Carolina, 8.
"Why did we decide to have another?" Shriver – nephew of late U.S. President John F. Kennedy – quips to PEOPLE. "Well, you could say we have an active sex life!"
– Linda Marx