Watch Robin Williams as Genie in Never-Before-Seen Clips of 'Aladdin'

Disney has released never-before-seen clips and outtakes from the 1992 picture "Aladdin" on Digital HD and Disney Movies Anywhere on Sept. 29. The Blu-ray pack, which will be available on Oct. 13, features a sequence that the late Robin Williams worked on as the Genie but was never animated and seen on screen.

Original cast members, as well as the creative team, stopped by on "Good Morning America" on Friday to share their memories of Williams as the Genie.

"He was the Genie," John Musker, who wrote and directed the film said of Williams. "There was nobody else that could be the Genie," Ron Clements, co-writer and co-director added.

The never-before-seen clips of Williams as the Genie, exclusively included in the "Aladdin" Diamond Edition blu-ray release, was first announced during the D23 Expo held in September. According to a Disney blog, Eric Goldberg, who animated the Genie, rummaged through files and looked for the original artwork and voice recordings of Williams. He did new sketches in order to be in synch with William's original tracks. The sequence shows the Genie transforming into different things, including a boxer.

"It's really a tribute to Robin," Goldberg said of the sequence almost welling up.

According to the Disney blog, the creative team behind "Aladdin" was inspired to cast Williams as the Genie after seeing him in the short film "Return to Never Land." In the film, Williams was changed into a boy and was scolded by Walter Cronkite. Both Musker and Clements immediately saw Williams as the Genie transforming into other characters.

During their Friday appearance on "GMA," Musker said that the Genie was written specifically with Williams in mind. They were writing the script even if without assurance that Williams will agree to do the role. "We were totally walking down the plank. If he said no, we were going to be in big trouble because the whole concept was built around Robin," Musker said on GMA.

Fortunately, Williams agreed for the role and had in fact been very passionate about it. Clements recalled having recording session for straight four hours. "By the end he was just drenched. He would have so much energy and so much passion, Clements added.

Clements and Musker were joined by composer Alan Menken on "GMA." The composer recalled working with Robin as one of his amazing experience.

Joining Clements, Musker and Menken on "GMA" were Scott Weinger, the speaking voice of Aladdin and Brad Kane, Aladdin's singing voice; Linda Larkin, the speaking voice of Jasmine and Lea Salonga, Jasmine's singing voice; and Jonathan Freeman, the voice of Jafar.