TMZ reporting that this morning, Charlie was taken via ambulance to Cedars-Sinai Hospital in Los Angeles.   His father, Martin Sheen, mom Janet Templeton, and ex-wife Denise Richards are all there, according to their sources.    More info after the jump:

Charlie Sheen was rushed to the hospital this morning, TMZ has learned ... and a source at the hospital tells us, "It's serious."

We're told Charlie was taken out of his home on a stretcher and loaded into an ambulance at 7 AM.

Two young women exited the house at the same time Charlie was taken out with a towel partially over his face.

Charlie was transported to Cedars-Sinai Hospital in L.A. We're told tests were performed and doctors are waiting for results.

The 911 call was placed at 6:35 AM.

Sources say Charlie was having severe abdominal pains which triggered the 911 call. Stan Rosenfield, Charlie's publicist, tells TMZ Charlie was in the emergency room this morning -- sleeping.

TMZ also reports that last night's party contained even more porn stars, that it was a 48-hour plus party, and that the studios & producers of "Two And A Half Men" are "begging" him to go to rehab.    More updates on his condition as soon as we get them...