Ron Jeremy

Porn star Ron Jeremy is in critical condition after suffering an aneurysm in his heart, TMZ reports.

Stars who don't look their age!

On Tuesday afternoon, Jeremy, 59, checked himself into Cedars Sinai hospital after experiencing chest pain. Doctors then discovered the aneurysm. Jeremy has since been transferred to the Intensive Care Unit, where he's awaiting surgery.

Jeremy has appeared in more than 2,000 X-rated movies.