She's already walked the runway for Topshop, Sonia Rykiel and Moschino menswear - but this latest gig is a huge deal for Baldwin.
She's got family in high Hollywood places (actor Stephen Baldwin is her dad) and is BFFs with the likes of Kendall Jenner (another Topshop fan gal) but this is Hailey going it alone.
She was photographed by Harley Weir and styled by Topshop Creative Director Kate Phelan for the campaign that sees her style out some very cool denim separates from the collection.
Think nine styles (we've got eyes on the high waisted, tapered leg mom jeans) priced from £36 - 45 available online and in-store now.
She's a pretty cool poster girl for the high street brand, and yes she's made us want to do double denim all over again this summer.
Watch the campaign film right here.