Cynthia Erivo stepped on up.

The “Wicked: For Good” star rushed to protect her co-star Ariana Grande when she was charged by a crazed fan at Thursday’s premiere in Singapore, as captured by multiple eyewitness videos .

The “Side to Side” singer, 32, was signing autographs when a man climbed over the blockade and raced past a photographer toward Grande.

He threw an arm around the Grammy winner’s shoulders and began jumping up and down as co-star Michelle Yeoh looked on in fright.

Before security reached Grande, Erivo rushed toward the “Victorious” alum and attempted to push the fan away.

The man was then apprehended by multiple bodyguards.

The scary moment was caught in multiple fan videos, with one showing Erivo, 38, comforting Grande in the aftermath.

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