Warner Bros. and IMAX are unable to get the Happy Feet IMAX 3D print ready in time for the November 17 release date.

The movie will be released in both conventional and IMAX theatres. A simultaneous release is more important to the two companies who have agreed to release the film in IMAX 2D so it can be ready by November 17.

IMAX Co-Chairmen and Co-CEOs Richard L. Gelfond said "Unfortunately, to release it (concurrently in Imax and conventional theaters) it had to be in 2D, and we're exploring a subsequent release in 3D ... We remain really excited about this movie."

A spokeswoman for Warner Bros. said time constraints didn't allow for a simultaneous release of the film in 2D and 3D, but noted that a 3D release of the film, about a tap-dancing penguin, was still in the cards at some point.

The animated film features the voices of Elijah Wood, Robin Williams, Brittany Murphy, Hugh Jackman, Nicole Kidman, Hugo Weaving, Anthony LaPaglia, Magda Szubanski, Miriam Mirgoyles.

Happy Feet is set deep in Antarctica. Into the land of Emperor Penguins, where each needs a heart song to attract a soul mate, a penguin is born who cannot sing. Our hero Mumble, son of Memphis and Norma Jean, is the worst singer in the world...however, as it happens, he is a brilliant tap dancer!

Happy Feet was released November 17th, 2006 and stars Carlos Alazraqui, Lombardo Boyar, Jeffrey Garcia, Johnny A. Sanchez, Robin Williams, Elijah Wood, Brittany Murphy, Hugh Jackman. The film is directed by George Miller, Warren Coleman, Judy Morris.