The birthday today has a direct connection to The Velvet Rope, as she is arguably the most famous porn star of all time. Jenna Jameson has been doing porn since 1994, at the age of 20. She has done a couple of mainstream projects, though, which are a substantial role in Private Parts (not a porn, I swear!), and most recently, Zombie Strippers (along with Robert Englund). And to top it all off, she shares her birthday with Hugh Hefner!