Last week, John Green spent a few minutes with actor Ansel Elgort (Gus Waters) and Mike Birbiglia (Patrick, the support group leader) to do some Q&A for The Fault in Our Stars fans, where we find out what Ansel’s favorite scene to shoot was and the unique way in how he found out he got the part of Gus, and how Mike became interested in being part of the movie… kind of.