He began his career playing small roles in short movies and movies as Ride, Cowboy, Ride (1939 short). In the classic movie starring Clark Gable, Gone with the Wind (1939), Reeves played of role Stuart Tarleton. In the 1940 Reeves continued to make appearances in movies such as Blood and Sand (1941) with Tyrone Power, So Proudly We Hail! (1943), Winged Victory (1944), Samson and Delilah (1949), and the Western starring by William Boyd Border Patrol (1943), Colt Comrades (1943), Bar 20 (1943). George Reeves got his first starring role in 1948 movie Jungle Goddess (1948), as Mike Patton, an explorer rescuing a young woman who has been kidnapped by an African tribe. He also accompanied Johnny Weissmuller in the Tarzan saga Jungle Jim (1948).