He told the Huffington Post, “Talk about a reason that I didn’t get a part, man! I mean [laughs], oh my God. What a terrible thing! So, then, I thought, ‘Oh my gosh, how many horrible auditions have I had? Thousands. And what a funny bit. I’m a huge fan of Funny or Die and had toyed with the idea of putting something together with them. So, when that happened, it was just perfect. Let’s put together some funny auditions. Because the audition process is such a hoot anyway. And, listen, I’m not going to be great all of the time.”

The role of Sky went to Dominic Cooper.

Source: https://www.buzzfeed.com/kristenharris1/actors-bad-auditions