The CW series is currently in its sixth season.
This is the television festival's first time back in person in three years.
Camila Mendes, KJ Apa, Lili Reinhart, and Madelaine Petsch were at the nuptials.
Plus, Sprouse get candid with ET about his 'traumatic experiences' from the fandom's intense passion for Bughead and Barchie.
ET recently called up the 29-year-old for an ultra candid chat about the 100th episode and the advice he'd give to his younger self.
'Riverdale' is celebrating 100 episodes! Only ET has exclusive interviews with the entire cast on the show's most memorable moments.
Sabrina Spellman is back, but does this cameo really count as a crossover? Kiernan Shipka is dishing everything you want to know to ET!
Sabrina came from Greendale to Rivervale -- and not 'Riverdale'? Looks like someone needs to adjust their broomstick's GPS!
A crossover between the shows has long been in the works.
The actor played Hiram Lodge on the hit CW show.
From calling Hiram a 'little bitch,' to those epic Core Four clapbacks, Ashleigh Murray dishes on Josie McCoy's 'Riverdale' return!
Josie and the Pussycats are officially back in town and ET has the scoop on Ashleigh Murray's highly anticipated 'Riverdale' return!
