贾维斯（J.A.R.V.I.S.）全称为Just A Rather Very Intelligent System，是钢铁侠的人工智能计算机系统。贾维斯管理托尼·斯塔克的大宅与斯塔克大厦，并作为所有钢铁侠装甲中的用户界面在战斗中提供有价值的信息。
贾维斯是控制托尼·斯塔克的大宅的人工智能系统。他被以斯塔克童年时的管家埃德温·贾维斯之名命名。他帮助斯塔克制造了 Iron Man Armor: Mark II，协助他设计装甲并运行测试模拟。后来贾维斯成为钢铁侠装甲的操作界面，通过装甲与斯塔克确定计划并向他通报信息，如装甲的系统状态，大气环境条件以及在战斗中汇报对手的细节等。
War for Earth
当托尼·斯塔克与“小辣椒”·波茨约会之时，贾维斯通知他神盾局的探员菲尔·科尔逊想与他会面。斯塔克让贾维斯摆脱科尔逊，但是失败了，科尔逊控制了贾维斯的系统。后来在神盾局的浮空母舰上，斯塔克让贾维斯入侵神盾局的计算机，发现神盾局计划使用宇宙立方去创造武器。当洛基将斯塔克从斯塔克大厦扔出去时，贾维斯调动 Mark VII装甲救了他。在纽约之战中，贾维斯也给予了斯塔克帮助及建议。斯塔克将世界安全理事会发射的核导弹改道瞄准奇塔瑞的传送口，贾维斯建议他给小辣椒打个电话，他同意了。但是小辣椒被新闻上的入侵事件分心错过了这通电话。进入奇塔瑞的传送门不久后，贾维斯系统关闭了。
Aldrich Killian's War
贾维斯继续帮助托尼·斯塔克制造装甲，当斯塔克对抗纽约之战之后患上的焦虑症时，这些装甲组成了一个钢铁军团。 J.A.R.V.I.S. continued to help Tony Stark develop the armors that later became the 钢铁军团 while Stark was working through the anxiety disorder that he developed following the 纽约之战. After 开心霍根 was caught in an explosion at the Chinese Theater, J.A.R.V.I.S. helped Stark to digitally recreate the scene in order to find clues about the bombing. Following the 满大人的 forces attack on 托尼·斯塔克的大宅, Stark became trapped on the seafloor by the wreckage of his home, but J.A.R.V.I.S. took control of the Mark XLII suit that he was wearing and managed to pull him from the wreckage, flying him to the last location that they had discussed before the attack occurred.
Taking Stark to Rose Hill, Tennessee, J.A.R.V.I.S. began to malfunction as a result of the previous events and was unable to help him while he covertly gathered information on A.I.M. When J.A.R.V.I.S. finally came back online, he announced that the wreckage and debris had been cleared from Stark's mansion, thus removing the wreckage that had been blocking the door to the armor vault, prompting Stark to launch the House Party Protocol, deploying the Iron Legion as they went to confront Aldrich Killian. J.A.R.V.I.S. then acted as Stark's interface to all of the Iron Legion armor at once, following his orders and remotely setting the directive for the armors to attack all of the 绝境士兵 in the area.
Stark gave J.A.R.V.I.S. the order to use the Clean Slate Protocol, destroying all of his armors, after the defeat of Killian, beginning the reconciliation of Stark and “小辣椒”·波茨.
Assembling the Avengers
J.A.R.V.I.S. assembled the 复仇者联盟 upon insistence from 黑寡妇 when she needed help in Sudan against 九头蛇; the A.I. located each team member from their different locations around the world.
J.A.R.V.I.S. assisted Dr. Bruce Banner and Tony Stark in using the Scepter to finish the peacemaking program codenamed the Ultron Program. The two scientists left J.A.R.V.I.S. alone to upload the A.I., joining a party that the Avengers were having. Afterwards, Ultron awakened and quickly realized its situation. Before J.A.R.V.I.S. could contact Banner and Stark, Ultron shut him down, apparently killing J.A.R.V.I.S.
Instead, J.A.R.V.I.S. secretly went into hiding by spreading its own memory around the Internet to avoid detection. When the synthetic body arrived, J.A.R.V.I.S. was uploaded into it, and by merging with the power of the Infinity Stone, an entirely new being was made: 幻视.
- In the comics, Iron Man has a butler named Edwin Jarvis. This was changed because Jon Favreau didn't want there to be any confusion between Jarvis and Batman's butler, Alfred Pennyworth. In Iron Man 2: Public Identity it was revealed that Edwin Jarvis was Tony's butler when Tony was a child and when he passed away, Tony created an A.I. after him in memory of his late butler.
- Marvel Wiki上的贾维斯页面