The photo, released on Sunday, features the group posing together while Moroccan wears a Deadpool mask next to Reynolds who portrays the Marvel hero.
"Rocky snuck up on an unsuspecting couple wearing a Deadpool mask. Will they ever recover?" Carey captioned the image.
"Whoa. My vision board became a photo," Reynolds said in a comment.
Carey has recently released a 25th anniversary edition of her hit holiday album, Merry Christmas alongside a new music video for her song, "All I Want for Christmas Is You."