Mister Fantastic/Reed Richards is a Marvel superhero and one of the founding members of the Fantastic Four. He has vast knowledge of aerospace, engineering, and physics.
Reed Richards was the inventor of a spacecraft that got hit with cosmic radiation on its first journey. The radiation gave the ship's crew, the Fantastic Four, their powers. Richards recieved the ability to stretch his body into any shape.
Mr. Fantastic is the attentive leader of the Fantastic Four. His best friend is the Thing. He is the father of Franklin Richards and Valeria Richards, and his wife is Susan Storm. Johnny Storm is his brother-in-law.
Mr. Fantastic's main power is his extreme elasticity, but he also has very high intellect and is almost immune to most physical forces.
Mr. Fantastic was one of the top ten most intelligent American comic characters listed by Business Week.