The cities of Gotham and Riverdale collide this fall when DC Comics and Archie Comics bring together two high-profile female duos in the six-issue crossover Harley & Ivy Meet Betty & Veronica.

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Harley Quinn co-creator Paul Dini will collaborate with writer Marc Andreyko and artist Laura Braga on the miniseries, which sees the fan-favorite antiheroine and her pal Poison Ivy team up against Betty Cooper and and Veronica Lodge when a new proposal looks to drain the wetlands between Gotham and Riverdale. The nature lover that she is, Ivy comes up with the idea to kidnap Riverdale's resident heiress Veronica and her best friend Betty.

“It’s the sort of offer you scream out ‘YES!’ to before your eyes reach the middle of the email,” Dini said in a statement to Entertainment Weekly. “I’ve always wanted the chance to play in Riverdale and to help Harley and Ivy invade it is a dream come true. Marc’s a great talent and a good friend. Writing this series with him has been like sitting on the lawn during summer vacation and reading a big pile of DC and Archie comics. Except we have to stay indoors and type a lot.”

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Amanda Conners, who co-writes DC's Harley Quinn, will provide the covers for Harley & Ivy Meet Betty & Veronica, with Betty & Veronica's Adam Hughes providing variant covers. Conners' cover for Issue 1 is below.

Harley & Ivy Meet Betty & Veronica #1 goes on sale Oct. 4.