The wedding, hosted in Venice, Italy, is expected to cost millions of dollars as residents protest the upcoming luxury event.

Among the big names on the approximately 200-person guest list for the Bezos-Sanchez wedding are celebrities like Oprah Winfrey, Mick Jagger and Leonardo DiCaprio, as well as Katy Perry, who traveled to space alongside Sanchez on a Blue Origin flight in April, the AP notes.