(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 she’s sporting her usual smoky eye and messy hair. It’s 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. What’s the betting Sienna will be back to her sexy, fresh-faced self tomorrow?