Sabrina Carpenter is wishing her big sister a happy birthday today.

Sarah Carpenter, who looks like Sabrina‘s brunette doppelgänger, turns 21 today (October 10) and her baby sister celebrated with an adorable throwback.

Sab posted a picture on Instagram of the two of them, donning matching glittery pink tops, headbands, and flared jeans, clutching a doll wearing a similar ensemble.

“lil pigtails on the left is 21 today,” she wrote. “I love you S. Thanks for always being there.”

Aww. Happy birthday Sarah!