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Lionel Hahn/Abaca/Sipa USA
Diane can thank Bridget Brager for the actress' slicked-back hair, which perfectly complemented the dress.
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Frazer Harrison/Getty Images
Not only was the cape draped to perfection, but her red Judith Leiber clutch was in perfect contrast to the black dress.
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Frazer Harrison/Getty Images
The cape perfectly graced Diane's shoulders and continued to do so throughout the night.
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REX/Shutterstock
The cape never lost its volume.
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Trae Patton/NBC/NBCU Photo Bank via Getty Images
The beaded trim and midriff cutout, along with the actress' Fred Leighton Jewels, made this dress a stunner.
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Rob Latour/REX/Shutterstock
Even in the press room, the cape stood strong.