James Sie, the original voice of the cabbage merchant in the animated series, also plays the cabbage merchant in two episodes of the live action adaptation.
The creators of the original animated series, Michael Dante DiMartino and Bryan Konietzko, were originally hired as executive producers and showrunners. Unfortunately, the pair felt that Netflix did not follow through on their promise to support their vision for this retelling and decided to leave the project.
Daniel Dae Kim previously did an episode of the original animated series, voicing General Fong in the season two episode, 'The Avatar State' He also did seven episodes of The Legend of Korra, voicing Hiroshi Sato.
On X, Greg Baldwin, the voice of Iroh in animated Avatar projects starting in season 3 of Avatar: The Last Airbender, agreed with a statement that Paul Sun-Hyung Lee "was cast perfectly".
In season 1, episode 2 the scene where the trio are on Kyoshi Island and Aang is riding on his air ball around then smacking into the statue is a reference to the original series intro.