Burger King has already won the best Halloween costume contest.

The chain’s Rego Park location disguised itself as a McDonald’s ghost last Sunday, as first reported by Business Insider.

Courtesy of Burger King

The costume was part of a commercial poking fun at the chain’s main rival, an employee at the location said Wednesday.

Courtesy of Burger King

For several hours, the entire drive thru location at 92-85 Queens Blvd. was covered in a sheet with the word “McDonald's" written on it. A sign in front of the eatery read: “Boooooo. Just kidding, we still flame grill our burgers. Happy Halloween."

The Halloween prank spurred a social media storm.

Once again, @BurgerKing brilliantly trolls @McDonalds for #halloween Yet, it's always risky to take it at competitors.Don't try this at home pic.twitter.com/kHkR3Y6mr4 — The Growth Concierge (@GrowthConcierge) October 26, 2016

This Burger King dressing up as a McDonald's ghost is a a level of pettiness once unheard of pic.twitter.com/fldCfZ0gWD — Eric Fawcett (@Efawcett7) October 25, 2016

Burger King could not immediately confirm when the commercial would air.