Celebrity Proud Dad Alec Baldwin Shares Adorable Photo of Newborn Leo's Teeny Tiny Footprint By Jane Asher Jane Asher Jane Asher is a New York-based writer, editor, and social media manager covering all things beauty, fashion, and celebrity. She was previously the Assistant Social Media Editor at InStyle. InStyle's editorial guidelines Updated on September 19, 2016 @ 02:30PM Pin Share Tweet Email Photo: Gilbert Carrasquillo/FilmMagic Leonardo Angel Charles Baldwin may only be a week old, but he's taking social media by storm thanks to his doting parents, Hilaria and Alec Baldwin, who have posted countless Instagrams since his birth. Most recently, the dad-of-four took to the social media platform to show off baby Leo's teeny, tiny footprint inked onto the back of his hand. He posted the photo sans caption, letting the adorable footprint do all the talking. Alec and Hilaria have three children together: 3-year-old Carmen, 1-year-old Rafael, and now, newborn Leonardo. Hilaria took to Instagram to show off Leonardo just hours after his birth, and kept the sweet family moments coming, with a video of Carmen with the baby and a swoon-worthy photo of big brother Rafael holding his new baby brother. Alec, too, captured plenty of family moments, posting a sweet photo of his new family of four to Instagram with the caption, "Everyone's here..." Alec Baldwin Gives His Newborn Son the Sweetest Nickname in Adorable 'Gram Baldwin, who also has a 20-year-old daughter, Ireland, with ex-wife Kim Basinger, clearly has the dad routine down pat. Congrats to the new parents of three, keep those #babygrams coming!