When Laverne Cox went to the U.S. Open on Monday night to support Serena Williams, she was given  the ultimate compliment.

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Laverne Cox had the best reaction to being confused for Beyoncé at the US Open.

The 50-year-old actress joked on Instagram on Monday, "Not me getting mistaken for @Beyonce at the #USOpen tonight, then trending on Twitter as the internet cackles over the mistaken identity."

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The mishap was described as "funny as hell" by the speaker before she concluded, "Go @serenawilliams #GOAT."

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At the USTA Billie Jean King National Tennis Center in New York City, the 50-year-old Inventing Anna star was seated in the audience while donning a face mask.

Laverne was mistaken for Beyoncé online and in match broadcasts due to her face mask, black sheer top, brown leather bottoms, and hoop earrings.

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When the Daytime Emmy winner gushed, "You DESERVE!," her admirers laughed that she had "fooled" them. You could see the queen's aura coming from behind the mask.

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When a Twitter user posted the video with the caption "Beyonce at the #USOpen," confusion ensued.

Cox gained notoriety earlier that day when video of her supporting Serena Williams while wearing a black face mask and silver hoops of jewellery went viral.

"The fact that this is Laverne Cox has me screaming," a fan clarified. "Baby, this is Laverne Cox," said another.