Jake Gyllenhaal's Lawyers Demand Underwear Pic Be Taken Down

X17online caught up with Jake Gyllenhaal as he left karate class Thursday. Maybe he was training to kick some butt, since the actor is now involved in a legal war of words with several websites over a picture of him that surfaced online.

Gyllenhaal's lawyers are demanding that a picture of what is supposedly him in tighty-white-ies be removed from various websites, including Queerty.com.

The actor's lawyer says:

"...anybody could tell from a cursory examination, this is a fake picture, in which our client's head has been pasted on the body of another person."

Gyllenhaal's lawyers say the pic violates his rights by "portraying him in a false light, violating his right of publicity and constituting a false designation of origin in violation of the Lanham Act."

“Your publication of this fake photo violates many legal rights of our client by, among other things, defaming him."

We're not sure how the photo is defamatory ... that could be hard to prove in court. It's just Jakey in his undies (again, supposedly.) Maybe that's why the sites have yet to remove the pic ...

We wonder what belt he is.