The elaborate sound stage is located on the Walt Disney Studios lot in Burbank.
The cast includes Auli'I Cravalho as Ariel, Queen Latifah as Ursula, Graham Phillips as Prince Eric, Shaggy as Sebastian and John Stamos as Chef Louis.
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This unique version of "The Little Mermaid" will include familiar animated scenes plus live musical numbers. It'll be an old favorite, told in a new way.
"Everything that you love about 'The Little Mermaid' is still perfectly, 100% intact," Stamos said.
Stamos is embracing the crazy personality of Chef Louis in his performance. The actor said all the details - from the sets to the costumes - have floored him every step of the way.
"It's just beautiful Disney magic. I promise you, everybody should watch this," he said.
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Stamos added that the event will be enjoyable for all ages.
"The movie is 30 years old, so I'm sure there's a lot of parents out there that grew up with 'Mermaid,' and now they can watch it with their kids. But instead of just watching the movie as is, this is just a special, extra moment that will just sort of burst out of the screen," Stamos said.
"You have the animated side of things carrying the plot forward, so everybody gets their fix of nostalgia. But then we're sprinkling on a little something new for all the big, fat musical numbers," Phillips said.
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All the actors said they were awestruck when they saw all the many, moving parts of "The Little Mermaid Live" come together.
"Oh my gosh, it was really amazing. I've seen renderings of it, we've seen drawing. We've dreamt about it ourselves, but I remember Graham and I, who plays Prince Eric, walked onto that stage, and we, our jaws dropped. It's amazing," said Cravalho.
"The Wonderful World of Disney presents The Little Mermaid Live!," airs Tuesday, Nov. 5 at 8 p.m. PT, live on ABC.
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