The Adult Swim animated entry has been a ratings breakout on Mondays at 10:30 p.m.

Adult Swim has renewed Dan Harmon's Rick and Morty for a second season.

The animated series from the Community creator and Justin Roiland has been a breakout hit for Adult Swim on Mondays at 10:30 p.m., where it routinely tops competition on Comedy Central, MTV, Nick at Nite and FX by 22 percent to 83 percent among adults 18-49.

In its first six episodes, the series has increased its viewership by double and triple digits in the key demo of adults 18-34.

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"I am excited to make as much Rick and Morty as Adult Swim allows, and I'm relieved to be in a time slot of no strategic value to CBS," Harmon said of the renewal for one of the network's first primetime original series.

Added Roiland of the comedy about a loser kid and his alcoholic scientist grandfather: "I am humbled and super excited by the positive response to the show, and we have no shortage of ideas for future episodes."

The series recently outdrew Harmon's NBC cult comedy Community among men 18-34. Meanwhile, Community is still very much on the bubble, so Harmon is at least guaranteed one series on the air next season.

The renewal comes as Adult Swim is poised to expand its programming block to start at 8 p.m. beginning March 31.

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