It's long been a rumor and the evidence should really have only been that all of Christopher Nolan's other Batman films are equally as long, but we now know the official run time of The Dark Knight Rises.
According to The British Board of Film Classification, the official runtime is 164 minutes and 27 seconds, just over 2 hours and 44 minutes. Batman Begins was 140 minutes long and The Dark Knight was 152 minutes.
Leading an all-star international cast, Oscar winner Christian Bale again plays the dual role of Bruce Wayne/Batman. The film also stars Anne Hathaway as Selina Kyle; Tom Hardy as Bane; Oscar winner Marion Cotillard as Miranda Tate; and Joseph Gordon-Levitt as John Blake. Returning to the main cast, Oscar winner Michael Caine plays Alfred; Gary Oldman is Commissioner Gordon; and Oscar winner Morgan Freeman reprises the role of Lucius Fox.