Celebrity Celebrity Moms Chrissy Teigen and John Legend’s Baby Luna Turns 4 Months Old! See Mom and Dad's Celebratory Snaps By Olivia Bahou Olivia Bahou Facebook Olivia Solomon is a New York-based writer and editor who covers all things fashion, lifestyle, celebrity, and pop culture. She was previously the Assistant Digital Editor for InStyle, and her work has appeared in many national publications. InStyle's editorial guidelines Updated on August 15, 2016 @ 10:45AM Pin Share Tweet Email Photo: johnlegend/Instagram It seems like only yesterday we were obsessing over Chrissy Teigen’s killer maternity style and pining to meet her sure-to-be adorable new addition with hubby John Legend, but somehow baby Luna Simone Stephens is already 4 months old. Teigen and Legend took to social media on Sunday to share new photos and videos of their little one in honor of her “4 month birthday” and she has never looked cuter. In a sweet clip, Luna smiles and yawns in a cream-colored onesie while resting on a blue plaid blanket. “Happy birthday!” her mom coos in the background, writing, “I now celebrate monthly birthdays I guess.” “4 months. Enjoy the month birthdays while you can, buttbutt!!” she adds. Teigen also took to Snapchat to share a too-cute filtered pic of her daughter, which gave her larger-than life round eyes, acorn glasses, and a whiskered nose. VIDEO: Chrissy Teigen's Cutest Instagrams with Baby Luna Legend, too, got in on the fun, posting a photo of Luna looking up with awe at her famous father. “Sundays with Luna!” he wrote. Chrissy Teigen Shares a Sweet Video of Baby Luna "Hanging with Grandpa" Oh, what we would do to get in on this Sunday fun.