Charlize Theron, Matthew McConaughey, Zoe Saldaña, Joaquin Phoenix, Cynthia Erivo and Charli xcx all came out to the inaugural event, hosted by Jimmy Kimmel on Wednesday night.
The director wants audiences to "make their decisions about how they feel" about the technology, which is used to bring to life some archival photos in the film.
"Our heads are much dirtier than what's on camera," says Olivia Colman, who stars alongside Alexander Skarsgård in a romance between a fisherwoman and her wicker husband.