The principal cast sees KJ Apa, Lili Reinhart, Camila Mendes, Cole Sprouse, Marisol Nichols, Madelaine Petsch, Ashleigh Murray, Mädchen Amick, Luke Perry, Mark Consuelos, Casey Cott, and Skeet Ulrich returning from the previous season.

[28] Anthony Michael Hall (one of the Breakfast Club stars) joined the cast on August 21, 2018 playing Mr. Featherhead also during the fourth episode.

[31] In February 2019, Chad Michael Murray was cast as the recurring role of Edgar Evernever, the cult leader of The Farm and Evelyn's father.

[32] On February 27, 2019, Luke Perry (Fred Andrews on the show) suffered a massive ischemic stroke at his home in Sherman Oaks, Los Angeles.

After a second stroke, his family decided to remove him from life support and he died on March 4, at age 52 at Providence Saint Joseph Medical Center in Burbank.

The site's critics consensus reads: "Suspend your disbelief and hold on to your beanie: Season 3 of Riverdale is off the rails, and delightfully so.