Supergirl Season 4 was ordered in April 2018, and production began that July. Melissa Benoist stars as Kara, with principal cast members Mehcad Brooks, Chyler Leigh, David Harewood, and Katie McGrath also returning from previous seasons, while Jesse Rath was promoted to the principal cast from his recurring status in season three. They are joined by Sam Witwer, Nicole Maines, and April Parker Jones.
