 The news that Bomer had been cast as Blaine's brother appeared on January 27, 2012. Bomer had suggested to Glee co-creator Ryan Murphy that he consider using Gotye's song featuring Kimbra, "Somebody That I Used to Know", as a duet on the show. Murphy had already thought of doing the song, and a week later Bomer received a text from Murphy asking if he "wanted to come on the show to sing it". Bomer's scenes as Cooper were shot starting February 13. In addition, it was reported in early February that there would be a flashback scene featuring Cooper and Blaine when they were children; young actors were then being cast for the roles.
