“Men In Black 2″ gave us that fabulous Michael Jackson cameo. Who does the third installment have wrapped in a dark sheet until release day?

According to Will Smith, in Rio last Thursday with co-star Josh Brolin for a bit of press and previewing, agent J’s possibly gonna get his ‘poker face’ on.

ElCorilloRD quoted the “Men in Black 3″ star confirming Lady Gaga’s appearance.

Those who only read English might be a little confused though by the wording, so here’s the translation :

We have a couple of celebrity cameos, but I think I can not reveal who they are. We must keep as a surprise that Lady Gaga appears.

Considering her funky, out-there style of dressing, one can only assume Gaga is playing one of Earth’s many closet extra-terrestrials.

The site says the film’s producers have asked Smith not to reveal any of the other cameos lined up for the movie.

In the film, agent J (Smith) is sent back in time to the ’50s to save young K (Josh Brolin) from being killed. Tommy Lee Jones, Alice Eve, Emma Thompson, Jermaine Clement and Bill Hader (as Andy Warhol, no less) also star.