(This one in LA.)
The sleek Veronica Lake curls, the immaculate red lipstick and heavily powdered face are a far cry from her dishevelled, boho norm and what a difference a side parting makes.
The recent two-week publicity tour has been one long fashion parade, with Ms Miller donning as many as five outfit changes in one day it was just a matter of time before she wheeled out the classic 1940s look.
But while it would be impossible for someone as symmetrical and photogenic as Sienna not to wear a look well, I think she looks fresher and younger when shes sporting her usual smoky eye and messy hair. Its just more her.
If half the fun of make-up is being able to try something new, the other half is finding the look that suits you best. Whats the betting Sienna will be back to her sexy, fresh-faced self tomorrow?