LeBron James and his Cleveland Cavaliers are not only the reigning, defending NBA champion — they're also the undisputed champs of Halloween.

No other NBA squad killed October 31 better than the close-knit Cavs bunch Monday.

We dare you to say otherwise after peeping this Instagram post from King James himself.

Breaking down some of the best costumes from James's Halloween party, LeBron himself had to earn the MVP for his portrayal of Jerome from Martin.

Real tears over LeBron's caption the he wrote for a pic with his wife, Savannah, saying, "Told her if she want a winner she better drop that chicken dinner!"

Iman Shumpert's Joker to wife Teyana Taylor's Harley Quinn was pretty mean, too.

Tristan Thompson as Black Panther and his boo Khloe Kardashian as Storm was also a sight to behold. We guess this dispels any reported notions that LeBron doesn't want the center bringing Khloe around the squad.

Not to be outdone was J.R. Smith and his wife, Jewel, who did their best Dead Presidents rendition. Killed it!

Kevin Love and his girlfriend, Kate Bock, as Dumb & Dumber's main characters were pretty lit as well.

And just look how Kyrie Irving broke it down with these dance moves as a Power Ranger.

We told you the Cavs don't play when it comes to Halloween!

And for good measure, LeBron also used his Halloween party as a platform to troll Golden State Warriors All-Stars Stephen Curry and Klay Thompson, who the Cavs defeated in seven games during the 2016 NBA Finals this past June.

Just look at those tombstone cookies with Curry and Thompson's names on them.

Ouch.

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