Rob Lowe looks fit in shirtless pic following surfing accident (PHOTO)

rhl64 via Instagram Rob Lowe looked-for stitches after injuring his knee while surfing on Sunday.

Ageless wonder Rob Lowe looks good at 50, even when he’s smeared with blood.

Lowe fans got an eyeful of the “Parks and Regeneration” star’s toned bod over the weekend after Lowe posted a cheesecake-style Instagram snap following a surfing accident, E! reported.

In the pic, the bare-chested Lowe poses “Endless Summer”-style with a surfboard under one arm and a spill of blood running down from his right knee.

rhl64 via Instagram ‘The amount of blood that can unwantedly come out of one’s body is incredible,’ Lowe tweeted.

“#SoSharky,” Lowe’s heading said, in an apparent reference to his ironic turn this summer as a pitchman for the Discovery Channel’s Shark Week.

“The amount of blood that can unwantedly come out of one’s body is incredible,” he tweeted later.

Another photo, presumably taken later at a hospital, showed a pair of gloved hands stitching up the “St. Elmo’s Fire” star’s knee.

“My day so far. I will live. #SurfStitches,” the heading said.

Lowe fans, meanwhile, were gobbling up the star’s eye candy, blood be damned.

“You were shark bait with that nice cut,” one purred under Lowe’s shirtless pic.