Michelle Williams channels Cinderella for My Week with Marilyn Paris premiere

Michelle Williams looked like a pink fairy tale princess in her Dior gown at the French premiere of My Week with Marilyn in Paris last night, in contrast to her stripped back BAFTAs H&M dress.

The actress' big skirted frock reminded us a bit of those Big Fat Gypsy Weddings creations *giggles*

[Related article: Michelle Williams on being sexy]

However, Michelle's gown was not made by Thelma but in fact Dior, who sponsored the whole event.

Marilyn was a fan of the fashion house, and features in their new J'Adore Dior perfume ad.

Michelle Williams in Dior in Paris (l) and H&M in London at the BAFTAs (r) / Getty

Michelle's big pink puffball was quite the about turn from her sleek monochrome BAFTAs choice.

That slinky number was by high street fave H&M, but it was bespoke rather than off the peg.

[Related gallery: BAFTA 2012 red carpet fashion]

Although we can't get our hands on that particular number, Grazia reports we will be able to get a piece of the action. It has inspired a top and skirt in the latest H&M conscious collection, out in April.