That's one surefire way of getting people to watch The Leftovers. It's also bound to spook his fiance just a bit. This is LIV TYLER...

Justin's co-star admits she couldn't take her eyes off his special area when she saw photographs of him filming an *ahems* anatomically revealing scene for a TV movie in Queens, New York City in June 2013, in which he was clearly running in sweatpants without any underwear on.

The 37-year-old told Watch What Happens Live!: "There was this scene where he was jogging and there was quite a large bulge in his sweatpants and it was all over... I get distracted when I watch the pilot [of 'The Leftovers,] definitely. I'm like, 'Can't help but look there.' But I've never noticed the bulge other times."

In case you were wondering, Justin does work out. Sadly we don't have a picture of him flailing about in his trackie pants, but we do have one of him in uniform. Winner.

He said: "I like to work out in the afternoon, around three or four. I just don't like to wake up and sweat. I'd rather have a cup of coffee. In New York I used to just be more active. I'd always ride my bike everywhere or skateboard everywhere, walk, whatever. Then I started going to the gym.'

The 42-year-old actor got engaged to Rachel off Friends on his birthday in August 2012, but he recently hinted they're in no rush to get married. They are still enjoying their engagement.