He would not confirm any other people who have been rumored to make an appearance in the film; however, cameos from Prince William and Prince Henry have now been confirmed by actor John Boyega.
He also says that there will be "moving" tributes to the late Carrie Fisher through scenes of the film I would imagine[...]
Prince Henry Archives
Oh yeah, if you don't know, Markle is dating Prince Henry Yes… THAT Prince Henry.
Adams explained:
I posted this old photo I had found of Meghan and I on set I went to bed, and woke up in the morning and realized 'Oh, yeah I live in a world where you can't post things about Meghan'[...]