Tom Hiddleston, set to play Loki again in "Thor 3" actually took time out to write an articulate "Thank You" note to writer/director Joss Whedon. The British actor appreciated Whedon's portrayal of the character calling it his own "Hans Gruber."

Hans Gruber was the main villain of the 1988 classic action movie "Die Hard" starring Bruce Willis. He was played by Alan Rickman, a British stage actor, and that was his first movie role. Empire ranks Hans McGruber no. 17 on their "100 Greatest Movie Characters" list.

Tom Hiddleston's memorable email in full, shared by Business Insider as part of promoting the upcoming book "Joss Whedon, The Biography":

"Joss,

I am so excited I can hardly speak.

The first time I read it I grabbed at it like Charlie Bucket snatching for a golden ticket somewhere behind the chocolate in the wrapper of a Wonka Bar. I didn't know where to start. Like a classic actor I jumped in looking for LOKI on every page, jumping back and forth, reading words in no particular order, utterances imprinting themselves like flash-cuts of newspaper headlines in my mind: 'real menace'; 'field of obeisance'; 'discontented, nothing is enough'; 'his smile is nothing but a glimpse of his skull'; 'Puny god' ...

... Thank you for writing me my Hans Gruber. But a Hans Gruber with super-magic powers. As played by James Mason ... It's high operatic villainy alongside detached throwaway tongue-in-cheek; plus the "real menace" and his closely guarded suitcase of pain. It's grand and epic and majestic and poetic and lyrical and wicked and rich and badass and might possibly be the most gloriously fun part I've ever stared down the barrel of playing. It is just so juicy. 

I love how throughout you continue to put Loki on some kind of pedestal of regal magnificence and then consistently tear him down. He gets battered, punched, blasted, side-swiped, roared at, sent tumbling on his back, and every time he gets back up smiling, wickedly, never for a second losing his eloquence, style, wit, self-aggrandisement or grandeur, and you never send him up or deny him his real intelligence.... That he loves to make an entrance; that he has a taste for the grand gesture, the big speech, the spectacle. I might be biased, but I do feel as though you have written me the coolest part.

... But really I'm just sending you a transatlantic shout-out and fist-bump, things that traditionally British actors probably don't do. It's epic."

Whedon sent a simple response:

"Tom, this is one of those emails you keep forever. Thanks so much. It's more articulate (and possibly longer) than the script. I couldn't be more pleased at your reaction, but I'll also tell you I'm still working on it ... Thank you again. I'm so glad you're pleased. Absurd fun to ensue.

Best, (including uncharacteristic fist bump), joss."

A classic exchange between the two Marvel icons. Here's hoping that the two of them would work together again-possibly in "Avengers 3."