Slow your roll, bro! Ryan Reynolds had a curse-filled Halloween night this year. The actor posted a hilarious YouTube video entitled "How Deadpool Spent Halloween" on Tuesday, Nov. 3.

Reynolds, 39, plays the Marvel comic book antihero in the upcoming sci-fi adventure Deadpool — and in the video. Blake Lively's husband teases little kids who are dressed as X-Men characters such as Wolverine and Mystique.

"You may be wondering why I brought you here. At one point we must all join forces and become a team," Reynolds says in the clip. "Now, how many of you have taken a human life?"

The little trick-or-treaters ignore Reynolds, who hilariously goes on to spout some profanity. "This f—king sucks!" he says. When a boy reveals his laser superpowers, Reynolds quips: "That's the stupidest f—king superpower I've ever heard. You're not on the team. Kidding, you're on the team, you're not on the team. Get back over there and sit down."

Reynolds continues his laugh-out-loud exchange with a young girl, who asks if he's the Green Lantern. The hunky star played the superhero opposite Lively, 28, in a 2011 action flick.

"What does this suit look like to you, huh? Does it look like a leprechaun had sex with a cartoonist?" Reynolds asks. "Mystique, drop and give me 20."

Reynolds may have been peeved, but he got the gang together for a photo before calling it a night. "Remember, tonight we set our clocks back 34 years. #happyhalloween," he captioned the Instagram snapshot.

Lively added: "The beauty of Halloween-- You never know who's under the mask. @vancityreynolds killin it in the most elaborate #Deadpool Halloween costume ever. #squadgoals."

Watch the funny video above!

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics, and more delivered straight to your inbox!