Doctor Thaddeus Bodog Sivana is a fictional supervillain appearing in comic books published by DC Comics. Created by Bill Parker and C. C. Beck, the character first appeared in late 1939, opposite superhero Captain Marvel, in the debut story of both characters, found in Whiz Comics #2 (cover-dated February 1940) by Fawcett Comics. Sivana was soon established as Captain Marvel's archenemy and frequent foe. Sivana has kept that role through to the present, in his appearances in DC Comics, who eventually acquired the rights to Fawcett's superhero characters. In 2009, Doctor Sivana was ranked as IGN's 82nd Greatest Comic Book Villain of All Time.The character made his cinematic debut in the DC Extended Universe 2019 film Shazam!, portrayed by Mark Strong.…Wikipedia