The third Harry Potter film will be shown on large-scale Imax screens as well as normal cinemas when it is released around the world next summer.
The film will hit Imax screens in the same month as its normal release
The announcement follows the showing of The Matrix Reloaded and The Matrix Revolutions in Imax cinemas this year.
Harry Potter and the Prisoner of Azkaban is released on 4 June 2004 and it will reach Imax cinemas that month.
Imax screens stand up to eight storeys tall and can offer 3-D screenings. There are 220 of them in 30 countries.
Box office gold
Imax, which has traditionally shown specially-shot documentaries about visually appealing subjects like wildlife and exploration, is hoping feature films can help continue its growth.
Harry Potter and the Prisoner of Azkaban is expected to be a box office smash after the first two movies based on JK Rowling's books earned more than $1.8bn (£1bn) around the world.
Imax's shares rose 7% on the US Nasdaq stock market after the Harry Potter announcement.
Imax is in talks with film studio Warner Brothers to screen more of its movies, including the computer-animated November 2004 release Polar Express.