The 42-year-old "Deadpool" star had never shared the screen with The Rock until he joined the former WWE star, along with Jason Statham, on the set of the successful "Fast & Furious" franchise spinoff.
In the movie, it's revealed that Reynold's character used to be partners with Johnson's character of Luke Hobbs. Apparently the two were such close BFFs ... they even got matching ink.
"I can only imagine how upset I was to discover this. #HobbsandShaw @therock #Rebecca."Reynolds captioned the photo. He also used the hashtag "Rebecca," which The Rock threw back at him in a comment.
"You pull your shirt back to reveal our ink and it looks cool & sexy," Johnson replied. "I pull my shirt back and it looks like an indicator that I eat women and children. And please stop calling me Rebecca. What happened to our 'trust cone'?"
Everyone involved in the "Hobbs & Shaw" movie got in on the action with this post. Producer Hiram Garcia joked, "Wait till the audience sees you both have matching lower back tattoos as well!"
David Leitch the director of "Hobbs & Shaw", also took the chance to comment on Reynolds' photo, saying that the filming of the cameo was "one of my favorite days on set!"
Ryan also shared one half of a "best friends" necklace on his Instagram story and tagged The Rock, as he made sure nobody could mistake who his bestie was.
The relationship between The Rock and Reynolds seems much sweeter than his relationship with Kevin Hart.
As we reported, the "Jumanji" stars regularly trade joking insults about everything under the sun ... especially The Rock's workout attire.