"Riverdale" is going retro! On Twitter, several stars from The CW series shared photos that show Archie, Betty and Veronica in '50s dress, much like the classic versions of their Archie Comics characters.

"Best opening sequence ever tonight on #Riverdale," teased Lili Reinhart, who plays Betty.

"We're going old school tonight," added Veronica herself Camila Mendes.

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In the photos, Archie (KJ Apa) wears a bow tie, bowling shoes and a black and blue vest with a giant yellow "R" in the center. Likewise, Jughead wears a similar vest, though his has his signature "S" in the center. Both Betty and Veronica have retro bobs and long skirts. Notably, Betty has an engagement ring on her left finger.

According to the actors' Tweets, this will be the opening sequence on "In a Lonely Place," tonight's episode of "Riverdale." Beyond that, however, we don't have much context about how or why this scene occurs.

Starring K.J. Apa as Archie Andrews, “Riverdale” airs Thursdays at 9 pm on The CW. The series also stars Cole Sprouse as Jughead Jones, Camila Mendes as Veronica Lodge, Lili Reinhart as Betty Cooper, Ross Butler as Reggie Mantle and more. “Breakfast Club” alum Molly Ringwald will also recur as Archie’s mother Mary.