Tonights episode, and all episodes for the rest of our run, are for Luke, Reinhart wrote.
We love, honor, and cherish his memory every single day.
I only wish he were here to see how many lives he touched with happiness and laughter.

Cate Cameron/The CW
I know hes watching from above.
We love you, Luke.
She also posted a second memory, sharing her favorite photo of Perry taken by her costarCole Sprouse.
Luke, you left WAY more than a hat!
We miss you and keep you in our hearts every single day.
Thank you for all you gave the world, tonight is for you, he wrote.
I am so lucky to have known you Luke.
You were one of a kind and impacted everyones lives in such a meaningful way.
Tonight Season 4 ofRiverdalepremieres, he explained.
With an episode that honors our friend Luke.
(I love this picture of him with the boys.)
Its an episode thats bursting with sadness, but even more so with love.
Im humbled by the outstanding, heroic work everyone did on it.
I hope you like it, Luke.
As Archie says about his dad, You will always be a part of Riverdale.
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See below for a sampling of tributes to Perry from theRiverdaleteam.
TheRiverdaleseason premiere airs at 8 p.m.
ET on The CW.