We're just weeks away from the Royal Wedding of Prince Harry and Meghan Markle at Windsor Castle—a once-in-a-lifetime event that promises to be a spectacle unlike any other.

The Hollywood Reporter writes that the reported 600-person guest list for the couple's regal nuptials is already bursting with famous names, including Markle's pals Priyanka Chopra and Serena Williams, as well as some of her Suits co-stars.

Below, find out which celebrities are believed to be on the guest list for Prince Harry and Meghan Markle's upcoming May 19 wedding.

Prince Harry and Meghan Markle's Wedding Guests