"You ever crash a wedding?" DeVito asked the much-taller, former pro-wrestler in footage posted to Johnson's IGTV page on Nov. 24.
“No,” Johnson replied.
“You wanna do it?” asked DeVito.
The two decided to head into the festivities with a camera crew in tow. Belting out the song popularized by Nat King Cole, DeVito and Johnson walked in singing “Unforgettable” as a duet.
As they crooned, the stunned wedding attendees appeared shocked and delighted, applauding the duo for their performance.
On Instagram, Johnson explained the co-stars were “sippin’ on a lil’ Teremana tequila enjoyin’ the quiet sunset together in Mexico after a long week of Jumanji work when this idea hit.
“Crash the wedding. Grab a mic. Sing a special song. Say adios.”
Describing the moment as “actually quite beautiful,” The Rock also congratulated the new husband and wife.
“Congratulations to the lovey bride, Kristine and handsome groom, Will,” he said. “And their four children, Ryan, Mason, Edie & Max. Beautiful family. The Abbots aka Brady Bunch.”
In the video, DeVito offered up some advice to the couple – particularly the groom.
“Get a big house so he doesn’t have to bump into her,” he joked.
Johnson then said in comical fashion that he and DeVito abide by the five words, “Yes, honey. You are right.”