But it wasn't just the Coronation Street star's £11,000 Nevena Couture frock that won us over, her make-up was gorgeous too.
We got the insider goss from make-up legend Armand Beasley who created her look on the night.
On Catherine's eyes, he stuck to an 'old school Hollywood theme' using a metallic shadow from the Urban Decay Naked 2 Palette, £37, along with a sweep of Urban Decay Liquid Liner in Perversion, £14.
He 'emulated Grace Kelly eyes' by creating bold brows using Bobbi Brown Brow Pencil in Blonde, £16.
Her elegant updo - courtesy of Vincent Allenby, the Artistic Director at Trevor Sorbie Manchester - followed the vintage starlet theme.
But instead of going for a classic red lip, Armand switched things up with a zingy pink pout.
The bargain buy behind it? Max Factor Colour Elixir Giant Pen Stick in Vibrant Pink, £6.99. Unlike most lippies, it's water-based so feels super-lightweight but still delivers intense colour.
Lip perfection? Hell yes!
The same glam gurus were also responsible for Kym Marsh's red carpet get-up.
Vincent conjoured up a 'serpent-like twist' at the back of her head to emphasise the dress' plunging back.
Armand created dark winged eyes on the Corrie star using a Guerlain Eye Shadow Palette, £30, and Bobbi Brown Long Wear Eye Pencil in Jet, £18.
He added 'a flush of colour to the cheeks' using the oh-so-luxe Sisley Phyto-Blush Eclat in Pinky Rose, £50.
And proving lip crayons are the red carpet pout-perfector of the moment, Armand finished with Clinique Chubby Stick in Heaping Hazelnut, £17, a nude that's a smoky eye's BFF.
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