Game developers have long looked for ways to incorporate celebrities into their video games in an effort to beef up gamer interest. Big name stars like Kevin Spacey, Snoop Dogg, and Burt Reynolds have all played major roles in triple-A titles, and even just using an actor’s voice in a game can be effective at building hype.

To that end, Microsoft recently announced that UFC’s reigning Heavyweight champion, Fabricio Werdum, will have a voice-only role in Halo 5: Guardians, which is set to release later this year. And while Werdum’s part in Halo 5 was not immediately revealed, Microsoft did say that players will need to do some searching to find the cameo. According to Microsoft:

"Fabricio Werdum makes a small, voice-only cameo appearance in Halo 5: Guardians. He's a big fan of Halo and we're big fans of his, so it's always fun when these kinds of things work out. It's a bit of an Easter egg though, so you'll have to really be looking for it."

Even Halo might not seem like an expected choice for cameos, this isn’t the first time Microsoft has incorporated a celebrity voice in a Halo game. Conan O’Brien and Andy Richter appeared in Halo 4 as wise-cracking marines.

And Halo 5 won’t be the only game released this fall that will include celebrity cameos, either. Call of Duty: Black Ops 3 will feature Marshawn Lynch in the game’s campaign, and celebrities Jeff Goldblum, Ron Perlman, Neal McDonough, and Heather Graham in the game’s zombie mode.

It’s interesting that Microsoft elected to keep the nature of Werdum’s cameo hidden. Chances are they hope eager fans will search far and wide for the cameo, and generate a little extra buzz in the process. At least that’s what happened when Bungie revealed they had hidden an audio Easter Egg in one of Destiny’s updates a few months ago.

It’ll be interesting to see how quickly gamers are able to find Werdum’s voice in Halo 5. Chances are it won’t take too long.

What do you think about Fabricio Werdum’s cameo in Halo 5? Will you be searching for the Easter Egg? Let us know in the comments.

Halo 5: Guardians is set to release on October 27, 2015 for Xbox One.