During a Rotten Tomatoes IG Live Q & A session (starting at the 15-minute mark), Wittrock explained that the audition process was "big" and "daunting"- going the old-school audition route with Wittrock showing up to audition at a studio in front of a group while also being filmed and looked at from various angles (nice casting director story, too). Wittrock said the audition was "way bigger than I thought it would be" and that he was told he had the part about a week later. The actor hasn't seen the suit yet since they won't be "filming for a while"- but since he's reading the comics, he joked about having concerns about how skin-tight the costume will be. Here's a look at the full interview: