The Crown actress, 37, looked high-class in her glittering ensemble, which comprised a rock-encrusted dress, bracelet and heels for the London Fashion Week event.
The two-time Primetime Emmy Awards winner looked stunning in her classy black silk dress which boasted cape wings, a flattering sleek skirt and those all-important diamonds under the bust.
The star stepped out in a pair of sparkly knotted heels, and accessorised with yet more diamonds on her wrist and ears. The auburn beauty styled her luscious locks in subtle waves, tucking her fringe behind her ears while she sported a glamorous palette of makeup for the event.
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