All the secret 'Star Wars' cameos Mark Hamill has had in movies and TV

Scay is the alien with the monocle who mistakes BB-8 for a slot machine and then belches in his face. Lucasfilm story group member, Pablo Hidalgo, previously hinted about it online in a since-deleted tweet.

When a fan asked the name of the Canto Bight who interacts with BB-8, Hidalgo responded, "I'll just say this — he's listed in the credits as the second role someone very prominent in the cast plays."

Not only did Hamill voice Scay, he also wore a motion-capture suit to play the role as he later revealed on Twitter in 2019.

"It is commonly (& mistakenly) reported that I only did the voice of Dobbu Scay, but I filmed the scene in a full motion-capture suit w/ a giant-sized medicine ball to make me the same size as BB-8," said Hamill. "I didn't expect to be credited, assuming it would be another unbilled easter-egg."

Boolio gave the Resistance crucial information at the film's start and paid the price with his life shortly afterward.

The character was played on screen by Aidan Cook and was voiced by Patrick Williams.

Not even creature and special makeup effects creative supervisor Neal Scanlon knew about Hamill's secret role.

"We had no idea," Scanlon told Insider in March. "When we did that character on set, one of our puppeteers who operates the animatronic facial features voiced that line. And we had no idea that Mark was gonna play that until I went to the movies."

Hamill voices the droid EV-9D9, a bartender of the famous Mos Eisley cantina, in Chapter 5 of the Disney Plus series.

Hamill said he wouldn't tell fans what the letter "M." stood for. Fans have guessed it either stands for the actor's first name or his wife's name, Marilou York.

Daisy Ridley's Rey finds Luke at the very end of the film. Despite Luke having no dialogue, Hamill said on Twitter he has another speaking role in the movie.

Neither Hamill nor his pseudonyms are credited in the film. No one has been able to figure this one out yet.

Hamill hasn't only voiced characters in the live-action films and TV series. In "The Clone Wars," he voices Darth Bane. He's supposed to be the one who came up with the "Rule of Two," which states that only two Sith Lords can exist at any time.

During a 2014 Q&A, showrunner and producer Dave Filoni recalled how Hamill approached him, asking when he would appear on the animated series. Filoni was taken aback.

"I told him, 'I want to use you, absolutely, but I want to have a role for you, that I think is worthy of you and something you'd be interested in. I don't want to just bring you in,'" said Filoni of coming up with the right part for Hamill.

"When I had this opportunity, I thought, 'Oh what a great, bizarre reflection to have Mark play the ultimate side of good and light and then the father of old ancient evil," he continued. "He was super excited about that opportunity."

Filoni said he had Hamill record Darth Bane two different ways, using two different voices that were then layered on top of one another to create the character's unique sound.

You can listen to Filoni talk about creating Darth Bane here.