- The film was originally a film about the encounter and conflict between Shazam and Black Adam, but the producer decided to split the film into two original films.
- In the fight in the toy store, Billy Batson ran across a huge piano keyboard. The plot is based on the 1988 movie "The Big Shot."
- When Shazam wears a cloak, he also has a tiger on his buckle. This is a tribute to his ally in the comics, Mr. Tawky Tawny, the magic tiger.
- During the casting process, more than 100 actors auditioned. Zachary Levy originally auditioned for the adult version of Freddy.
- Before the filming started, Zachary Levi and Arthur Anqi rehearsed together. Zachary Levi will observe and they will talk together.
- Shazam’s suit was very tight, and the designers made ten identical clothes.
- Most of Shazam's nicknames in the film were invented by screenwriter Henry Gaydon.
Shazam! behind the scenes gags
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Shazam: [Shooting lightning bolts, to the tempo of the opening notes of "Eye Of The Tiger" from "Rocky"] Hands, lighting with my hands, lighting with my hands.
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Freddy Freeman: Supervillain! Supervillain!
Dr. Thaddeus Sivana: Worse. Much worse.
Freddy Freeman: Radioactive anthromorph? Psychic energy manipulator? I won't let you read my mind! My mind is blank! You can't get in!
Dr. Thaddeus Sivana: I don't have to read your mind. Because you're going to tell me everything.