Jessica Alba, Khloé Kardashian, and More Stars Share Photos of Their Kids' First Days of School

"First few days at school for MJ 💕 she didn't even turn back around . . . ," Duff wrote on July 11, sharing a photo of her daughters, 4-year-old Banks and 2-year-old Mae, on their first day of school. Duff shares the girls with husband Matthew Koma, and she also shares an 11-year-old son with ex-husband Mike Comrie.