We have some very exciting casting news today for Supergirl Season 3. Actress Sharon Leal has been cast to play the role of Miss Martian, the niece of Martian Manhunter. It looks like the CW is taking Supergirl to a whole new level for this upcoming season, and I think fans are going to really enjoy the changes. Are you excited for Miss Martian to join the show? Let us know AFTER THE JUMP. Supergirl kicks off seasson 2 on October 10th.