Matt Winkelmeyer/Getty
Lara Walsh
Aug 31, 2016 @ 9:30 am

Kate Beckinsale is every mom getting nostalgic about her daughter's final first day of school!

The 43-year-old, who is no stranger to posting throwback pictures of her only child, shared a photo just last Thursday of her daughter Lily, now 17, working alongside her in the movie Underworld as a child, and now the British actress is taking another adorable trip down memory lane with the sweetest back-to-school shot.

"First first day of school/last first day of school. Love you so much," the proud mom captioned the collage, which features a throwback shot of a smiling young Lily ready for her very first day of school—with center-parted pigtails, a blue pleated uniform, white Velcro shoes, a white polo, and a bright blue backpack—alongside a current photo of the teen, in which she looks like a dead ringer for her mom.

First first day of school/last first day of school. Love you so much @lily_beckinsale ❤️❤️❤️

A photo posted by Kate Beckinsale (@katebeckinsale) on

In the photo of Lily's last day of high school, the high school senior wears a decidedly different look than the first, rocking a white graphic T-shirt, black jeans, a black backpack, and dark center-parted locks.

RELATED: Kate Beckinsale's Teenage Daughter Lily Can Officially Drive—See the Hilarious Video

They sure grow up so fast!

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