LOS ANGELES (AP) — Fans of the animated science fiction comedy series “Rick and Morty” can rest easy.

Series co-creator Justin Roiland posted on Instagram on Thursday that 70 more episodes have been approved for the Cartoon Network’s Adult Swim late-night programming. There were 31 episodes in its first three seasons.

READ MORE: 'My Nerves Are Still Rattled': Passenger Aboard Amtrak Train Talks Crash

The series, which debuted in 2013, follows mad scientist Rick Sanchez and his grandson Morty Smith. It was the top TV comedy among millennials in 2017 and enjoys digital, livestream, gaming and retail success.

READ MORE: Man, Pregnant Woman & Baby Killed In Crash Along Highway 360; Police Investigating

To celebrate the renewal, the pop-up shop “Rickmobile” will launch a nationwide tour in Atlanta on May 17.

MORE NEWS: Flash Flooding: Second Body Recovered After Vehicle Swept From Texas Bridge

(© Copyright 2018 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)