Kate Middleton, Duchess Catherine, Prince William

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Now this is what you call a new mom glow!

Kate Middleton may have dressed causally for her first appearance since welcoming Prince George on July 22, but for her red carpet debut she went all out.

Clad in a dazzling metallic Jenny Packham gown and matching sandals, the duchess attended the Tusk Conservation Awards at the Royal Society in London on Thursday with husband Prince William.

Thanks to the dress's silky sequin draping, the elegant number emphasized her super-slim new mom body, which the world has already gotten glimpses of in the last few weeks.

Kate Middleton, Duchess Catherine, Duchess of Cambridge

Press Association via AP Images/ Yui Mok/PA Wire

Of course, this is the second time since welcoming her first child that the Duchess of Cambridge has opted for the British designer. She now-famously had a blue polka-dot frock specially made by the brand for Prince George's first photos outside of St. Mary's Hospital in London.

Unlike that dress, this Jenny Packham gown is indeed for sale. Well, for a limited time. No doubt this style will sell out in only a matter of hours.

What do you think of Kate's look?

PHOTOS: Kate Middleton's maternity style

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