As you can see, Anthony Daniels doesn't always have to wear C-3PO's helmet on set, and here he seems to be enjoying a relaxing past-time in between scenes: posing for potential photographs that might be uploaded to the official Twitter account.
Who will clean up this mess?
In another black-and-white snap from Rian Johnson himself, we're teased about the mayhem to expect from The Last Jedi's action scenes. Or perhaps a peek into the morning after the wrap party. You decide!
Leia's new costume
Star Wars Celebration 2017 kicked off with a video tribute to Carrie Fisher, and within the clip is a few seconds of Rian Johnson accompanying the actress on set. Note Leia's new outfit and start speculating wildly on what it means.
Is it raining? I didn't notice
In another photo from Rian Johnson, we see Daisy Ridley's Rey battling with an invisible foe and some presumably troublesome weather. Either that, or umbrellas hold a different purpose in the Star Wars universe.
Billie Lourd returns
Billie Lourd, the daughter of Carrie Fisher, played a small role in The Force Awakens but will almost certainly have more screen time in The Last Jedi. In this image, we see that she is, as expected, part of the Resistance.
Poe takes a coffee break
Oscar Isaac's in-flight entertainment between scenes appears to be a hot drink. Let's hope his X-wing has a cup holder or there'll be some puzzling coffee stains in The Last Jedi.
Poe, Finn and Leia at Resistance HQ
Here we see Oscar Isaac, John Boyega and Carrie Fisher discussing a scene, rehearsing a scene, or chatting about something completely unrelated. Regardless, our eyes are drawn to the surroundings. At what point in the film could this be?
Captain Phasma laughs in the face of Finn
It's still unclear whether Gwendoline Christie will once again be completely masked throughout The Last Jedi. We do at least know her character, Captain Phasma, will have at least one encounter with Finn. (Or John Boyega just really loves hanging around on set.)
In this busy scene, C-3PO is right in the middle of the action. One thing's for sure, he'd be hard to lose at a party or the Cantina.
Someone lurks in the shadows
It's almost certainly Luke preparing himself for the cameras. It's possibly a scene continuing from the prior film's cliffhanger (on a cliff, handily enough). Either way, it looks important.
Mon Calamari makeup
Sorry to burst your bubble, but there's a human playing each Mon Calamari character, and it requires a lot of makeup to get that fashionable aquatic look just right.