Gabriel LaBelle plays both young Johnny/Julian and also Colin, the son of Julian's love interest.
The episodes Pretty Baby, Rapture, Nothing is Real But the Girl, Sunday Girl and Atomic are all named after Blondie songs. The theme song Call Me is also by Blondie.
Richard Gere was 29 years old in real life when he played Julian in the 1980 original movie, while Jon Bernthal's pre-prison 2006 version of Julian in this 2022 remake makes the character 30 years old, but Bernthal was 45 years old in real life.
Paul Schrader the writer & director of the 1980 Original Film, disapproved the show and had nothing to do with it