From her friendship with tennis pro Serena Williams, to her small roles opposite Jason Sudeikis and Ashton Kutcher, we're taking a closer look at the future royal's connection to nine Hollywood stars.

Philipps tells ET about her throwback moment with Prince Harry's future wife! Plus, what it's been like for the 'I Feel Pretty' star to reunite onscreen with her bestie, Michelle Williams, years after 'Dawson's Creek.'