This was a model I created for my daughter's wedding. I thought other fans of the movie might be interested.
There are 3 main models, 2 are designed for multi-material printing.
The topper was printed twice, mirrored, then both halves aligned and glued together. This allowed for printing on a textured sheet giving both the front and back view the same finish. It also added rigidity and more surface area for gluing onto the base.
The base is hollowed, there should be plenty of room for a small battery powered led light strip. The base lettering is thin enough that it should light up. The base's back just pops into place. Depending on your printer's tolerance it might be loose or tight. It was just right for me, so I didn't design in any fasteners.
The cake itself was just a simple after-thought model I whipped up so the couple could display the topper as it won't stand on it's own, and trying to snap off the pegs would risk ruining it.
I'm including the Fusion 360 file in case anyone wants to tweak the design. If you have the ability to do more than 4 colors almost every part is it's own body so you can re-save the meshes to incorporate additional colors.
The light I used was https://www.amazon.com/dp/B0852MD6HV While I'd have preferred it to be brighter, it worked well enough and lasted over 5 hours.