Los Angeles-based RealD said Tuesday afternoon that the firm is powering the U.S. premiere of James Cameron's AVATAR, at the Grauman Chinese Theatre. The firm, which develops 3D movie projection technology, said the premiere will be the first time 3D has been displayed in the theater. The theater recently installed RealD's XL Cinema System. The U.S. premiere is set for Wednesday. RealD said its equipment, which is used in conjunction with digital movie projection hardware to add 3D film support, was also used in the December 10th world premiere of AVATAR in London.