Celebrity Alec Baldwin Gives His Newborn Son the Sweetest Nickname in Adorable 'Gram By Isabel Jones Isabel Jones Instagram Twitter Isabel is an Oregon-born and Brooklyn-based writer and editor with a special interest in pop culture. InStyle's editorial guidelines Updated on September 14, 2016 @ 03:00PM Pin Share Tweet Email Photo: iamabfalecbaldwin/Instagram Alec Baldwin is a new dad for the fourth time—and judging by the look on his face, he still finds the process completely enthralling. Baldwin’s yoga instructor wife, Hilaria, gave birth to the pair’s third child together just yesterday, a baby boy whom she introduced to the world as Leonardo Ángel Charles Baldwin. But the busy mom isn’t the only one eager to share her son with the public. Shortly after Hilaria published her ‘gram, the elder Baldwin posted a shot of himself cradling newborn “Leoncito,” grinning down at the baby in pure delight. Leonardo joins Baldwin siblings Ireland, 20, Carmen, 3, and Rafael, 15-months. Leonardo and Rafael ... were Hilaria and Alec going for a Renaissance painter theme? Big sister Carmen also spent quality time with the newborn. In a video the yoga instructor posted to Instagram yesterday, the little girl wore a sweet red headband and serenaded her brother with a beautiful rendition of “Twinkle, Twinkle Little Star." If you listen carefully, you can hear her actor dad whisper these sweet words of praise to his daughter: “You’re so special, Carmen.” Hilaria and Alec Baldwin Welcome Baby No. 3 The couple’s second youngest, Rafael, is noticeably absent from the video, which Hilaria explained in the video's informative caption: “Rafa is learning to be gentle so I couldn't get a good shot of them together...he was fascinated with poking the baby's eyes .” It looks like Baldwin eventually managed to grab a shot with Rafael: VIDEO: Yoga For 2 Featuring Hilaria Baldwin What a sweet family!