The Celestials are perhaps the single most powerful race in the Marvel Cinematic Universe, but there have been precious few examples of them throughout the franchise's many films. The grand cosmic beings are the single oldest sentient creatures in the Marvel Universe, having been responsible for the creation of the Eternals, Deviants, and many more life forms. As a result, the importance of the Celestials' role in Marvel's cosmology, both in the films and the comics, cannot be understated.