WARNING: This post contains SPOILERS for Avengers: Endgame.
-
Marvel Studios' Vision android in Avengers: Age of Ultron. Paul Bettany, who voiced Jarvis in the MCU movies, also plays Vision.
However, as the Marvel films saw Agent Carter prequel TV show, Jarvis appeared as a main character, assisting Peggy Carter (Hayley Atwell) in her various missions for the Strategic Scientific Reserve. For Avengers: Endgame, Marvel dug into its own TV roots for a special Jarvis appearance.
When Tony and Steve Rogers (Chris Evans) travel back to 1970 in order to get the Tesseract/Space Stone and more Pym Particles in order to return to the present, Tony runs across a younger version of his father, played by John Slattery. The two share some touching moments talking about fatherhood, and Tony gets some closure to his troubled relationship with Howard. At the end of this sequence, Howard gets into his car, and standing beside it is his butler Jarvis, played by Agent Carter's own James D'Arcy.
MCU fans who have only watched the movies - or, at least, those who didn't watch Agent Carter - may not realize the connection between Howard's butler and the larger universe. But in fact, Marvel TV role making the jump to the MCU movies. Fans have been calling for the likes of Daredevil and the Agents of S.H.I.E.L.D. to team up with the Avengers, but while Endgame didn't deliver on those particular fan wishes, the movie does acknowledge at least one TV character.
Jarvis' appearance in Endgame also further confirms the character's life-long tie to the Stark family. Although Howard loaned Jarvis out to Peggy Carter in the 40s, he's still very much a trusted ally to Howard in the 70s. It further cements why Tony's interface is named Jarvis, because Jarvis was such an important part of Howard, then Tony's life. Bringing Jarvis to life, and having Agent Carter's D'Arcy play him, is a good way to honor the character as well as the TV side of the MCU in Avengers: Endgame.
