Neil Gaiman, the man behind the Good Omens live-action adaptation of the book he co-authored, has just confirmed that Jon Hamm, who plays archangel Gabriel on the show, did not, in fact, get the role in a traditional way.
Source:https://www.cbr.com/jon-hamm-didnt-need-to-audition-for-good-omens-says-neil-gaiman/