MTV reports the "Avengers" actor crashed the Wheatland Music Festival Saturday to take over the stage and perform a rendition of country singer Hank Williams' "Move It on Over."
It seems a bit random; however, the actor, best known for his role as Loki in the Marvel universe, is playing Williams in future biopic "I Saw the Light."
It looks like Hiddleston wanted to get a bit of practice in for the role.
You can watch a piece of the performance below as captured by one spectator.