So last night it was the Star Wars premiere in London.
John Boyega brought along his family with him.
And then Prince William and Harry were introduced to BB-8, the loveable rolling-around-on-the-floor robot.
And then, in a rather bizarre scene, BB-8 followed the royal protocol and bowed to them both.
It was pretty weird and delightfully British.
And quite a few people were surprised by it all.
Although someone did point out this.
And it's not the first time they have met either. Prince William visited Pinewood last year whilst filming for The Last Jedi took place, resulting in this hug from Chewie.
Oops. Something went wrong. Please try again later
Looks like we are having a problem on the server.
Should BB-8 follow the royal bowing protocol?