Dr. Robert David Bruce Banner, M.D., Ph.D., also known as Hulk (born December 18, 1969), is a major character in the Infinity Saga of the Marvel Cinematic Universe. He is the titular main protagonist of The Incredible Hulk, one of the titular protagonists of The Avengers tetralogy, one of the two tritagonists (alongside Valkyrie) of Thor: Ragnarok, and a cameo character in Iron Man 3, Captain Marvel and Shang-Chi and the Legend of the Ten Rings. Versions of him also appear in What If...?, serving as a minor character in "What If... The World Lost Its Mightiest Heroes?" and "What If... Ultron Won?", and one of the protagonists of "What If... Zombies!?".