The UKLast Jedi spoilers lie ahead, friends. Proceed with caution.

The Canto Bight casino sequence in Star Wars: The Last Jediwas a big moment for eagle-eyed easter egg hunters.

No other part of the movie featured such a diverse array of extras milling about in the background. There was never any question that the new Star Warswould have some secrets tucked away, and Canto Bight was a likely home.

And it was, but with an important catch: You needed to listen, rather than look.

Mark Hamill and Joseph Gordon-Levitt both have roles during that scene, as Entertainment Weeklyrevealed on Sunday. Or their voices do, at any rate.

Hamill's Luke Skywalker wasn't secretly lurking around in the background. He actually asked director Rian Johnson for a second role in the movie, during the Canto Bight sequence. And sure enough, he's attached to two characters during the closing credits: Skywalker, and someone called Dobbu Scay.

"I said I’d love to do a CGI thing, and he said sure," Hamill said of asking Johnson for a second role. He's got quite the voice acting resume, most notably for playing Batman's nemesis, the Joker, in various animated features and video games.

Dobbu Scay remains a mystery, however. Hamill doesvoice the character -- and there's some theorizing that he's the stubby, drunken alien who mistakes BB-8 for a rolling slot machine -- but the actual identity of this character hasn't been formally revealed.

That's not the case for Gordon-Levitt's cameo, however. While you'd be hard-pressed to recognize him beneath the alien get-up, his character -- named Slowen-Lo -- is the snitch that spots Finn and Rose's shuttle on a nearby beach, then alerts local authorities when he spots the two Resistance members in the casino.

Gordon-Levitt apparently drew inspiration for his character's Texas-style twang from a cartoon classic: Foghorn Leghorn. But that's not the only pop culture reference he's connected to in The Last Jedi.

His character's name, Slowen-Lo, is a nod to the classic Beastie Boys cut, "Slow & Low." In fact, the alien race he represents -- the Abednedo -- has a broader connection to the New York City hip hop originals.

Ello Asty, the Abednedo pilot who pals around with Poe Dameron, nods to the Beastie's fifth studio album, Hello Nasty. Awls Ooteek, an Abednedo referenced in the Chuck Wendig novel, Aftermath: Empire's End, is a nod to the earlier Beastie's album, Paul's Boutique. And Senator Brasmon Kee, who appears in The Force Awakens, is a cute play on the beloved Beastie's cut, "Brass Monkey."