<Ul> <Li> Robert Downey Jr. as Tony Stark / Iron Man : The benefactor of the Avengers , who is a self - described genius , billionaire , playboy , and philanthropist with electromechanical suits of armor of his own invention . On how his character evolves after the events of Iron Man 3 , Downey said , `` I think he realizes that tweaking and making all the suits in the world -- which is what he has been doing -- still did n't work for that thing of his tour of duty that left him a little PTSD . So his focus is more on how can we make it so that there 's no problem to begin with . That , you know , there 's a bouncer at our planet 's rope . That 's the big idea . '' </Li> <Li> Chris Hemsworth as Thor : An Avenger and the crown prince of Asgard , based on the Norse mythological deity of the same name . Regarding Thor 's place in the film , Hemsworth stated that as Thor has remained on Earth since Thor : The Dark World , and has begun to feel at home here , he considers Ultron 's threat a personal attack . Hemsworth stated that he had to work harder to bring new elements to the character to avoid repeating himself saying , `` It gave us room to kind of make him a little more grounded and human and have him in some civilian clothes and mixing it up at a party . '' Hemsworth noted that Thor 's motivations in this film were completely different , as it was the first MCU film where he did not play against Tom Hiddleston 's character of Loki . </Li> <Li> Mark Ruffalo as Bruce Banner / Hulk : An Avenger and a genius scientist who , because of exposure to gamma radiation , transforms into a monster when enraged or agitated . To prepare for the role , Ruffalo worked with motion capture performer Andy Serkis ' The Imaginarium Studios . He stated that his character had grown since the previous film and was `` a bit more complex '' . Ruffalo explained that a confrontation is brewing between Banner and the Hulk saying , `` There 's a very cool thing happening : Hulk is as afraid of Banner as Banner is afraid of Hulk ... and they have got to come to peace somehow with each other . '' While filming in London , Ruffalo said that Whedon still had not given him any of the Hulk 's lines . Whedon later explained that he writes the Hulk 's dialogue spontaneously , saying , `` What makes the Hulk so hard to write is that you 're pretending he 's a werewolf when he 's a superhero . You want it vice versa ... So the question is , how has he progressed ? How can we bring changes on what the Hulk does ? And that 's not just in the screenplay , that 's moment to moment . '' </Li> <Li> Chris Evans as Steve Rogers / Captain America : The leader of the Avengers and a World War II veteran , who was enhanced to the peak of human physicality by an experimental serum and frozen in suspended animation before waking up in the modern world . Evans stated that since the fall of S.H.I.E.L.D. in Captain America : The Winter Soldier , Rogers has been left to depend on his Avenger teammates without the structure of military life and is now `` looking to understand where he belongs , not just as a soldier , as Captain America , but as Steve Rogers , as a person . '' Evans said that he was able to maintain the strength he built up for Captain America : The Winter Soldier by working out up to an hour a day . Regarding Captain America 's fighting style , Evans felt he did not want to take a step back from the skills shown in The Winter Soldier , making sure Rogers ' fight style advanced , showing `` a consistent display of strength '' and having Rogers utilizing his environment . </Li> <Li> Scarlett Johansson as Natasha Romanoff / Black Widow : An Avenger who formerly worked for S.H.I.E.L.D. as a highly trained spy . Producer Kevin Feige stated that more of the character 's backstory is explored in the film . Johansson elaborated , `` In Avengers 2 we go back ... we definitely learn more about Widow 's backstory , and we get to find out how she became the person you see . All of these characters have deep , dark pasts
<Ul> <Li> Robert Downey Jr. as Tony Stark / Iron Man : The benefactor of the Avengers , who is a self - described genius , billionaire , playboy , and philanthropist with electromechanical suits of armor of his own invention . On how his character evolves after the events of Iron Man 3 , Downey said , `` I think he realizes that tweaking and making all the suits in the world -- which is what he has been doing -- still did n't work for that thing of his tour of duty that left him a little PTSD . So his focus is more on how can we make it so that there 's no problem to begin with . That , you know , there 's a bouncer at our planet 's rope . That 's the big idea . '' </Li> <Li> Chris Hemsworth as Thor : An Avenger and the crown prince of Asgard , based on the Norse mythological deity of the same name . Regarding Thor 's place in the film , Hemsworth stated that as Thor has remained on Earth since Thor : The Dark World , and has begun to feel at home here , he considers Ultron 's threat a personal attack . Hemsworth stated that he had to work harder to bring new elements to the character to avoid repeating himself saying , `` It gave us room to kind of make him a little more grounded and human and have him in some civilian clothes and mixing it up at a party . '' Hemsworth noted that Thor 's motivations in this film were completely different , as it was the first MCU film where he did not play against Tom Hiddleston 's character of Loki . </Li> <Li> Mark Ruffalo as Bruce Banner / Hulk : An Avenger and a genius scientist who , because of exposure to gamma radiation , transforms into a monster when enraged or agitated . To prepare for the role , Ruffalo worked with motion capture performer Andy Serkis ' The Imaginarium Studios . He stated that his character had grown since the previous film and was `` a bit more complex '' . Ruffalo explained that a confrontation is brewing between Banner and the Hulk saying , `` There 's a very cool thing happening : Hulk is as afraid of Banner as Banner is afraid of Hulk ... and they have got to come to peace somehow with each other . '' While filming in London , Ruffalo said that Whedon still had not given him any of the Hulk 's lines . Whedon later explained that he writes the Hulk 's dialogue spontaneously , saying , `` What makes the Hulk so hard to write is that you 're pretending he 's a werewolf when he 's a superhero . You want it vice versa ... So the question is , how has he progressed ? How can we bring changes on what the Hulk does ? And that 's not just in the screenplay , that 's moment to moment . '' </Li> <Li> Chris Evans as Steve Rogers / Captain America : The leader of the Avengers and a World War II veteran , who was enhanced to the peak of human physicality by an experimental serum and frozen in suspended animation before waking up in the modern world . Evans stated that since the fall of S.H.I.E.L.D. in Captain America : The Winter Soldier , Rogers has been left to depend on his Avenger teammates without the structure of military life and is now `` looking to understand where he belongs , not just as a soldier , as Captain America , but as Steve Rogers , as a person . '' Evans said that he was able to maintain the strength he built up for Captain America : The Winter Soldier by working out up to an hour a day . Regarding Captain America 's fighting style , Evans felt he did not want to take a step back from the skills shown in The Winter Soldier , making sure Rogers ' fight style advanced , showing `` a consistent display of strength '' and having Rogers utilizing his environment . </Li> <Li> Scarlett Johansson as Natasha Romanoff / Black Widow : An Avenger who formerly worked for S.H.I.E.L.D. as a highly trained spy . Producer Kevin Feige stated that more of the character 's backstory is explored in the film . Johansson elaborated , `` In Avengers 2 we go back ... we definitely learn more about Widow 's backstory , and we get to find out how she became the person you see . All of these characters have deep , dark pasts
who are the superheroes in age of ultron
who are the superheroes in age of ultron
Tony Stark / Iron Man Thor Bruce Banner / Hulk Steve Rogers / Captain America Natasha Romanoff / Black Widow
Tony Stark / Iron Man Thor Bruce Banner / Hulk Steve Rogers / Captain America Natasha Romanoff / Black Widow Clint Barton / Hawkeye