Tom Hiddleston takes carol break during Hank Williams recording session

British actor Tom Hiddleston has surprised fans with a little festive treat after teaming up with country singer Rodney Crowell for a rendition of We Wish You A Merry Christmas.

The Thor star is currently holed up in Nashville, Tennessee working on his portrayal as country icon Hank Williams, Sr. in forthcoming biopic, I Saw the Light, and he recently enjoyed an impromptu carol session with Crowell, who portrays his onscreen father, Elonzo Huble 'Lon' Williams.

A representative from Crowell's management team has since shared video footage of the sweet acoustic sing-a-long on YouTube.com, in which Hiddleston is featured holding a black and white dog, named Mono, in his lap.

The video caption reads: "Rodney Crowell and Tom Hiddleston, working on the soundtrack for 'I Saw the Light' take a short break to spread some holiday cheer at Rodney's studio with his wonder dog, Mono."

Crowell is also serving as Hiddleston's vocal coach and working on the film as an executive music producer.