Chris Miller and Phil Lord officially announced the Han Solo film at Star Wars Celebration Europe 2016. During this announcement of the “best kept secret in Hollywood” Alden Ehrenreich was also officially announced as our new Han Solo.
Miller spoke about how casting a young Han Solo was the single hardest casting of all time and they saw over 3,000 people for the role. Lord said this was all a waste of time however as Alden Ehrenreich was literally the first person to audition. Ehrenreich screen-tested with Chewbacca and aboard the Millennium Falcon. He’s relieved that his casting has been officially announced as people have been congratulating him and he couldn’t say anything.
It was also announced Han Solo will likely begin filming at the end of January 2017.
Source: Star Wars Celebration