For the Trekkies out there, today is “First Contact Day,” which marks the day humans and Vulcans first made contact in Star Trek lore, and the director of the latest Trek film is celebrating in style. Justin Lin, who takes over the Trek franchise from J.J. Abrams and brings his Fast & Furious expertise to the table, has shared a behind-the-scenes image from the first day of filming Star Trek Beyond (which, in case you were wondering, has long since wrapped). Not only is this image notable because it gives us a look at a pair of alien beings from the new Trek film, but it also serves as a massive tease for an Easter Egg.

Lin is opening this image up to a contest, with the first person who correctly guesses the identity of the two actors winning an official Star Trek Beyond crew t-shirt and a signed poster. Lin says the actors are not listed on the film’s IMDb credits and the only hint he gives is that he’s worked with them before, so it’s a bit of a toughie. The big guy couldn’t possibly be Dwayne Johnson could it? As for the other one, your guess is as good as mine, but I’m going with Community alum Danny Pudi as Lin helmed the classic paintball episode “Modern Warfare.”

So quick, shoot off your guesses to Lin. Also of note, he mentions that the official t-shirt for the film contains spoilers, so he can’t send it out until closer to the film’s release date. Hmm…

Star Trek Beyond finds the crew on their five-year mission and brings Idris Elba into the fold as a villainous character, with Kingsman standout Sofia Boutella playing a new ally. Chris Pine, Zoe Saldana, Zachary Quinto, Simon Pegg, Karl Urban, John Cho, and Anton Yelchin also star as Lin works from a script penned by Pegg and Doug Jung. Star Trek Beyond opens in theaters on July 22nd.