Bridgerton heartthrob Jonathan Bailey plays Elphaba's love interest in the latest addition to the Oz franchise

In one of the very first shots of the film, there’s a rainbow over Oz. This is perhaps the most obvious Easter egg and a direct callback to The Wizard of Oz and “Somewhere Over the Rainbow”—it immediately lets audiences know the stories are intertwined.

The "Wicked" movie references the musical and "The Wizard of Oz." You probably caught its biggest cameos, but you may have missed other easter eggs.