Ron Jeremy in critical condition after aneurysm

Adult film star Ron Jeremy has been hospitalized and is in critical condition following an aneurysm. Jeremy, 59, reportedly drove himself to Cedars-Sinai hospital on Tuesday while experiencing extreme chest pains. Doctors discovered the aneurysm near his heart. His condition has reportedly worsened and he's been transferred to the ICU where he's being prepped for surgery.

Ron -- and his 9-inch penis -- have appeared in more than 2,000 X-rated movies together  ... including, "Super Hornio Brothers," "High Heels, Low Standards," and "A Christmas Orgy." [TMZ]