Actors began testing for the roles of the five Power Rangers on October 2, 2015. On October 7, 2015, Naomi Scott was cast as Kimberly. Newcomers Dacre Montgomery, Ludi Lin and RJ Cyler were then cast as Jason, Zack, and Billy, respectively. At the month's end, Becky G was chosen to play Trini. When it came to casting the Rangers, Director Dean Israelite said, "From the very beginning, diversity was a very important part of the whole process," and that while the characters' races were switched around, he added that, "We made sure that the essence of each of those characters are who they were in the original show, and this really will be an origin story of those characters." On February 2, 2016, it was announced that Elizabeth Banks would portray Rita Repulsa. Four months later, Bryan Cranston, who voiced Twin Man and Snizard in the original series, announced he was cast as Zordon. Cranston revealed that he would perform motion-capture and CGI. In September 2016, Walter Emanuel Jones, the actor who played Zack in the original series, stated none of the original cast would cameo in the film. Towards the end of the month, Comedian Bill Hader was cast as Alpha 5. In March 2017, it was reported that Amy Jo Johnson and Jason David Frank, who played Kimberly and Tommy in the original series, would cameo in the film, despite Jones' earlier comments.