Rob Lowe shares his candid thoughts on posting 'thirst traps' in an exclusive interview with PEOPLE. The actor, 61, posted a ...

Rob Lowe, 61, and his son John "Johnny" Lowe, 29, showed off their matching muscles in a shirtless Instagram photo, ... The actor wore gray workout shorts, while Johnny opted for light-wash jeans.

Rob Lowe and his son John Owen, 29, pose together for a shirtless gym selfie, ... His son John Owen posed on the other side of him, wearing light blue jeans, white sneakers and a baseball cap.

Rob Lowe and his 29-year-old son, Johnny Lowe, ... Johnny wore a pair of jeans, sneakers, and a baseball hat, while his dad posed in a pair of shorts — and nothing else.

As Hollywood careers go, Rob Lowe’s has been incredibly Hollywood, ... He is wearing jeans and a navy V-neck James Perse T-shirt that hugs his lack of paunch, just as it was meant to.

Rob Lowe, 61, took to Instagram ... The actor wore gray workout shorts, while Johnny opted for light-wash jeans. He completed his look with white sneakers with pink shoelaces and a beige-and-red ...

Rob Lowe shares his candid thoughts on posting "thirst traps" in an exclusive interview with ... while John Owen, 29, did the same while wearing light blue jeans, white sneakers and a baseball cap.