2010s: Rise to prominence
In August 2009, Page was cast in the big-budget Christopher Nolan science fiction film Inception, which began filming the same year. The film was released on July 16, 2010, and was a commercial success. It received widespread acclaim from critics, being hailed as one of the best films of the 2010s. Page played Ariadne, an architecture student who is a newcomer to dream espionage. The cast, including Page, earned several accolades, with Page earning nominations from the Saturn Awards and the MTV Awards. He also starred in the 2010 black comedy superhero film Super, which he accepted after seeing the script for the film. The film received mixed reviews, though Page was praised for his performance as a psychopathic teenage sidekick. In January 2010, Page began appearing in a series of advertisements for Cisco Systems, including commercials set in Lunenburg, Nova Scotia. That April, the Michael Lander film Peacock featured Page as Maggie Bailey, a struggling young mother. Page noted the film as "one of the boldest screenplays I've come across in my albeit short career; it's a character and story I can throw myself into and exactly the type of movie I love to be a part of".
In April 2011, it was announced that Page would co-star as Monica in the Woody Allen film To Rome with Love, a film told in four separate vignettes; the film was released in 2012. In June 2012, Quantic Dream announced the video game Beyond: Two Souls, in which Page portrays one of the main player characters, Jodie Holmes, through voice acting and motion-capture acting; it was released on October 8, 2013, in North America. The game polarized critics, but Page earned praise for his performance, with GamesTM calling it "truly breathtaking ... Jodie's character is one we've seen before in many films – a troubled child with a gift, haunted by spirits, struggling with growing up", but Page excelled in giving "gravity and warmth" to the character. He was given various awards and nominations for the role, including the British Academy Games Award for Best Performer. In 2013, another video game, The Last of Us, was released. Page accused the production for using his likeness without permission for the character Ellie; the character's appearance was subsequently redesigned to better reflect the actual performer's personality and make the character younger.
In 2013, Page stated that his directorial debut would be Miss Stevens, and would star Anna Faris and be produced by Gary Gilbert, Jordan Horowitz and Doug Wald; the project eventually moved forward without Page, with scriptwriter Julia Hart replacing Page as the director. Also in 2013, he co-starred in Zal Batmanglij's thriller The East, a film inspired by the experiences and drawing on thrillers from the 1970s, and he also starred in Lynn Shelton's Touchy Feely. In 2014, Page reprised his role as Kitty Pryde in X-Men: Days of Future Past (2014). The film was a major box-office success, and received positive reviews from critics, being noted as one of the best films in the X-Men franchise. Page was praised for his performance and was nominated for the Teen Choice Award for Choice Movie Scene Stealer and the Kids' Choice Award for Female Action Star. In December 2014, Page portrayed Han Solo in a staged reading of Star Wars Episode V: The Empire Strikes Back.
In 2015, Page starred in and produced the film Freeheld, about Laurel Hester, which was adapted from the 2007 short film of the same name. The film received a mixed response from critics, with review site Rotten Tomatoes writing that "Freeheld certainly means well, but its cardboard characters and by-the-numbers drama undermine its noble intentions". In 2016, Page co-starred in the Netflix film Tallulah as the eponymous character; the film marked his third collaboration with director Sian Heder, and his second collaboration with Allison Janney, both of whom he worked with on Juno. In the film, his character is a young woman who abducts a baby and tries to pass it off as her own. On his acting, The Guardian wrote "...what grounds it are the terrific performances and Heder's rich direction and screenplay". In the same year, he appeared in the film Window Horses and provided the English voice of Rosy in the French film My Life as a Zucchini, the latter of which earned critical acclaim and a nomination for the Academy Award for Best Animated Feature.
On November 9, 2017, it was announced that Page had been cast in the main role of Vanya (later Viktor) Hargreeves in the Netflix superhero series The Umbrella Academy. The show received positive reviews from critics, and Page was acclaimed for his performance, earning a Saturn Award nomination in 2019 and winning the Saturn Award for Best Supporting Actor on Television in 2022. After Page came out as transgender, it was revealed that he would continue his role in the show, with Netflix updating Page's name across the service. In March 2022, it was announced that Page's character would return in the upcoming third season and transition to male; the character briefly comes out to his siblings during "World's Biggest Ball of Twine". Gizmodo reported that the change "was very likely done to reflect Page's own transition".
Page headlined the science-fiction film Flatliners, a remake of the 1990 film of the same title which was released in 2017, emerging as a commercial success. Flatliners was panned by critics, although Page and the ensemble cast were praised, with film critic Matt Zoller Seitz writing that "Luna and Page in particular make much stronger impressions than you might expect, given the repetitious and mostly shallow scenarios they're asked to enact ... But the choppy, cliched visuals and the script's superficial approach to the characters' predicaments ultimately undo any goodwill that the actors can generate." Also in 2017, he produced and starred in the film The Cured. In 2019, Page starred in the Netflix miniseries Tales of the City as Shawna Hopkins, which received positive reviews.
