KJ Apa is remembering his Riverdale dad Luke Perry.

The 21-year-old actor took to Instagram on Thursday (March 7) to pay tribute to his co-star after his tragic death earlier this week.

PHOTOS: Check out the latest pics of KJ Apa

“Rest in Love bro,” KJ captioned the below photo of Luke smiling while riding on a boat.

On Riverdale, KJ and Luke played father-son duo Archie and Fred Andrews.

The show recently announced that all episodes from now on will be dedicated to Luke.

See KJ‘s sweet post below.