I believe the CGI alien that put coins in BB8 is Mark Hamill. I read that somewhere. Is that right?
That’s speculation, which I doubt because it doesn’t say anything.
I’m pretty sure Hamill voices the first alien we see on Canto Bight (the mustache twirling one on the yacht). But I don’t think they’ve revealed anything officially.
No, I read about it around Christmas, right before I saw the movie the second time. You can hear that the alien is voiced by Hamill.