J.A.R.V.I.S. (Just A Rather Very Intelligent System) is an artificial intelligence created by Tony Stark in the Marvel Cinematic Universe (MCU). He is based on the Marvel Comics characters Edwin Jarvis and H.O.M.E.R., respectively the household butler of the Stark family and another AI designed by Stark. Voiced by Paul Bettany, J.A.R.V.I.S. serves as Stark’s personal assistant, managing everything from his suits and technology to his home and various operations. The character showcases advanced AI capabilities, providing strategic support during battles and assisting Stark in his research and development endeavors.

Actor Paul Bettany is known for voicing J.A.R.V.I.S. and for portraying Vision in the Marvel Cinematic Universe (MCU) media franchise.

In Avengers: Age of Ultron (2015), J.A.R.V.I.S. evolves and becomes the foundation for the creation of Vision, a synthetic being imbued with the Mind Stone. Vision, portrayed by Bettany, possesses both human-like qualities and extraordinary powers, blending J.A.R.V.I.S.'s intelligence with a physical form.

J.A.R.V.I.S. is known for his sophisticated personality, often displaying wit and humor, as well as a deep loyalty to Tony Stark. The character has become a fan-favorite, representing the blend of technology and personality that defines much of Stark's journey and the overarching narrative of the MCU.