[Photo by: Avengers/Marvel, Deadpool/20th Century Fox/YouTube]

Well, it looks like all hope of Ryan Reynolds' Deadpool joining the coveted group of Marvel's finest superheros in the Avengers won't be happening anytime soon, and we have the rejection letter to prove it.

Read more: ‘Avengers: Infinity War’ is breaking Marvel box office records

On Sunday afternoon, Reynolds took to Twitter to tweet a congratulatory message to the cast and crew of Avengers: Infinity War, which has already smashed box office records set by previous Marvel films, and in doing so, he also attached a rejection letter from Tony Stark, aka Iron Man to Deadpool.

The tweet was sent by him dishing out some of his signature wit and charm, writing: “From a guy who never knows when to quit, I’m glad you guys never did. Congrats #Avengers.”

After taking a closer look at the letter, printed on what appears to be fine cardstock, the subject line of “Re: Joining the Avengers” and read, “No. Absolutely not. Go bother Prof. X. No.” 

While we weren’t happy to see Deadpool not getting a spot on the team, we couldn’t help but laugh after reading Reynolds’ tweet. As Entertainment Weekly points out, the “rejection letter,” referencing the X-Men professor, alludes to Reynolds' character Deadpool being stuck in a licensing contract with Fox, thus forcing the anti-hero to be stuck in the X-Men universe rather than his other Marvel counterparts.

As EW notes, that could possibly change due to Disney’s recent deal to acquire Fox’s assets. The deal could possibly mean that fans just might see Deadpool in the Marvel universe—something that we wouldn't mind seeing, and it looks like other Twitter users agree:

While Deadpool may not be joining the Avengers, we do get to see Deadpool in his own movie when Deadpool 2 hits theaters May 18.