Miller was born in Wycoff, New Jersey on September 30, 1992. His mother is a modern dancer, and father a publisher. Miller has two older sisters, Saiya and Caitlin. When he was six, Miller started to train as an opera singer, to help him overcome a speech impediment. He sung with the Metropolitan Opera, and performed in the U.S. premiere of Philip Glass’s contemporary opera White Raven.
After his voice began to change, Ezra was kicked out of the opera in what he calls a traumatic but necessary transition into the other arts. He attended Rockland Country Day School and The Hudson School. Ezra dropped out at sixteen, after the release of his film Afterschool. The 2008 Antonio Campos film saw Ezra as the lead, a teenager with a strange fetish at a boarding school. After that Miller appeared in City Island with Andy Garcia, Julianna Margulies and Steven Strait as a precocious chubby chaser. Miller also acted in Beware the Gonzo and Every Day – where he played a gay teenager with Liev Schreiber and Helen Hunt as his parents, both of which premiered at the Tribeca Film Festival. Miller next appeared in the BBC Films movie We Need to Talk About Kevin with John C. Reilly and Tilda Swinton, which was directed and adapted by Lynne Ramsay from American author Lionel Shriver’s 2003 novel of the same name. The film has become a Cannes Film Festival sensation. Miller also acted as Damien on the Showtime’s hit comedy television program Californication. He appeared on Royal Pains as Tucker Bryant for two seasons. His most recent role was Patrick, in the movie adaptation of the novel The Perks of Being a Wallflower, opposite Logan Lerman and Emma Watson, where he was praised on his performance of gay teenager Patrick. Next up, Ezra will play Leon in Madame Bovary, along Mia Wasikowska, Rhys Ifans, and Paul Giamatti.
Ezra spends his free time as drummer for his band Sons of Illustrious Father in his home-base of Brooklyn. He is also an activist, frequently seen at the March on Wall street Protests, and journeyed to the North Pole on a cross-country ski trip to encourage anti-climate change.