Duff has an impressive collection of over 20 tattoos — mostly scattered across her arms. While Sophie would certainly be pro-ink, they didn't want her to have quite as many designs as the actor does in real life, so they covered most of them.
"We would get a laugh when Duff would show up to work with a new one," says Middleton. "I covered all of her tattoos except for one small one on each arm." Because tattoos are forever, that meant Cattrall also needed to get matching ink. "We painted the little heart on Kim's wrist, so that it would match Hillary's real tattoo."