Matthew Knocks Up His Hot GF!

Matthew McConaughey is bringing a baby bongo player into the world.

M.M. announced on his website today that his girlfriend, Camilla Alves, is pregnant with his child.

McConaughey wrote, "My girlfriend Camila and I made a baby together ... it's 3 months growin in her womb and all looks healthy and lively so far." And we love this.... "We are stoked and wowed by this miracle."