This sweet video of a police officer engaging in a dance-off against a little cancer patient will brighten your day.

The viral video, posted to YouTube, shows San Francisco Police Officer Joseph Marte and 4-year-old cancer patient Colten Guerra facing off in a breakdance battle.

KTVU reported that Marte visited UCSF Benioff Children's Hospital so that Colten "wouldn’t feel like an outsider in a great big city.”

Colten had seen videos of Marte breakdancing online, so the little boy challenged him to a dance-off.

"Of course, I couldn't say no to him,” Marte told KTVU.

Watch the dance battle above.

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