Laura Dern Made Gun Noises
It’s quite surprising to know that it’s not only Ewan McGregor who made noises while filming. Just like how McGregor imitated lightsaber sounds while filming, Laura Dern was also in a similar situation. During the filming of The Last Jedi, Dern also made “pew pew” gun sounds while pretending to fire her laser blaster for her scenes.
Of course, just like McGregor, her voice had to be removed in the final editing of the film to be replaced with the real sound effects. However, if you look closely, her mouth can also be seen moving and mouthing the sound effects. To prove this claim, Rian Johnson, the director of the film, mentioned this during the commentary version of the movie.