Most surprising about the whole thing?

All it took to convince Tatum to play the part was a friendly email.

We have a very special role that we would like you to play, Rogen wrote at the time.

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Credit: Astrid Stawiarz/Getty Images; Romain Perrocheau/Getty Images; Suzanne Hanover

I know this is crazy, but we really think it will get a massive laugh.

He added, yo dont take this the wrong way or be insulted by this.

We just think its a great joke and you would be great doing it.

To Rogens surprise, Tatum sent his three-part response within hours: One, what the f?

Two, thats the craziest sh Ive ever heard.

Three, when and where do I show up?

I think they were already filming.

That was a terrible idea, probably.

Hear Rogen read from his email below.