RIVERDALE actor Lochlyn Munro has dished on season two, his co-star Cole Sprouse and when fans will learn the identity of Jason Blossom’s killer.

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Munro, who plays Hal Cooper on Netflix’s hottest show of the year, was on the Gold Coast at the weekend for the Supanova expo at Broadbeach.

media_camera Lochlyn Munro on set of Riverdale with Lili Reinhart and Madchen Amick. Picture: Supplied

He revealed fans will discover who killed Jason Blossom in the season’s penultimate episode, which airs in two weeks.

“How do you know it wasn’t me?” he laughed.

“We find out who killed Jason Blossom in episode 12, my character also has a really big secret come out in episode 12.

media_camera Luke Perry, K.J. Apa, Madelaine Petsch, Camila Mendes, Cole Sprouse and Lili Reinhart from the cast of 'Riverdale' Picture by: Rex Features

“They didn’t give out the scripts until we did a table read … and even the person (who killed Jason) didn’t know.

“When we got to the final page we all gasped.”

media_camera Cole Sprouse with twin brother Dylan in their Disney days.

Munro also revealed two new characters that might enter the show next season.

“We (the Coopers) have another child out there, his name is Chick,” he said.

media_camera The Coopers: Lochlyn Munro on set of Riverdale with Madchen Amick. Picture: Supplied

“It was in the comic and I believe that might be a storyline that comes full circle.

“They’ve also cast Hiram Lodge but we don’t know who he is yet.

media_camera Riverdale on Netflix KJ Apa as Archie and Luke Perry as Fred Andrews

“We start filming our second season in mid-June and it will go for 23 or 24 episodes … (season one) was such a critical time for the writers because they had to make the show so epic that it would get renewed so now maybe they can take a breather … and build a better arc for each character.”

Munro “couldn’t say enough” about his younger co-stars including Cole Sprouse and newcomer KJ Apa.

media_camera The young stars of Riverdale, at Coachella: Casey Cott, Lili Reinhart, Cole Sprouse, KJ Apa and Camila Mendes. Photo by Rich Fury/Getty Images for H&M

“Cole has been around forever so he has a huge following but he’s also such a nice kid, so humble and very intelligent,” he said.

media_camera New Zealand-born actor KJ Apa.

“And KJ is such a talented musician, he’s the youngest of the cast by at least two or three years, he’s such a goofy kid and really fun-loving.

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“I’ve known Luke Perry (of 90210 fame) forever … when we did the first read-through, we looked at each other and realised how full circle we’d come,” he said.

media_camera Beverly Hills 90210 star Luke Perry on Vanity Fair at the height of his fame.

“We used to date these girls and now we’re their dads.”

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He also revealed why Ross Butler, who recently starred in Netflix’s 13 Reasons Why, was noticeably absent after Riverdale’s pilot episode.

media_camera Lochlyn Munro on set of Riverdale with Casey Cott, KJ Apa and Ross Butler. Picture: Supplied

“Ross did the pilot for Riverdale then he booked 13 Reasons Why and they couldn’t get him back to Riverdale,” Munro said.

“So every once in a while you see him come in and out of an episode … it’s only when 13 Reasons Why released him for long enough.”