That time when a photo of Ryan Reynolds' penis was on the loose.

Of all the penis pictures you might accidentally stumble across daily (hey, no judgement here), Ryan Reynolds' could well be the holy grail.

And it turns out we’re all in with a chance of a glimpse, with Reynolds admitting on Conan O’Brien that there’s a photo of his man parts floating around online somewhere.

Listen to how Ryan tells it, here:

Reynolds told the story of how, when he was younger, his father would upload hundreds of photos from around the house each day and send them to friends and family via dial-up broadband in the evenings.

"I’m not joking here, you’d have like 400 or 500 photos of a blurry meatloaf. And it would take the gross domestic output of most counties just to download all of these horrible files," Reynolds joked.

So an 18-year-old Reynolds decided to conduct a small experiment, snapping a photo of the crown jewels with his dad’s camera.

"I just wanted to see if he would naturally edit the photos at some point," he explained. "Nope."

Ryan Reynolds in 2014. Image: Getty.

Ryan Reynolds and Blake Lively in 2014. Image: Getty.

Those dedicated to clicking through his dad’s daily photo upload would have caught a glimpse of Ryan’s meat and two veg instead of the usual meatloaf.

"I hope it doesn’t happen, but there’s a penis picture of mine floating around somewhere," Reynolds admits.

He insists you shouldn’t get too excited about the prospect of catching a glimpse, though.

"I’ve heard of people who are like, sexting and stuff, and who’ll send a picture of a penis. I can’t think of anything more threatening to send a woman than a picture of a penis."