But maybe it wasn't Katie's (or the stylist's) doing. Maybe it was Suri, 4, who made mama so sexy?
"The other day we came out of a store, and she said, 'I want to go there,' pointing at another store quite a distance away. In that store was the dress that she wanted. I said, 'Wow, Suri. You're something. You picked that out from a football field away,'" Holmes told the mag.
She may just be entering kindergarten but Suri already become that snarky friend that you want telling you not to wear your fat jeans.
"She'll really tell me [what she thinks]. Like today I'm wearing brown suede pants, and she said, 'I don't like your pants.' But then she'll say, 'You've got to wear these shoes.' Or 'That's so pretty, Mom. Wear that.' She's got a great eye," Holmes says.
To find out more about Suri's fashion sense and how Katie transformed herself into one of our favorite style icons, Jackie O., check out Elle online.
And check out these celeb kids destined to become style icons.