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Rick and Morty co-creator Justin Roiland, 39, broke the news of Mike Mendel’s death on Twitter this evening. Writing in view of his 746,000 followers, the voice actor, writer, producer and director said: “My friend, partner, and line producer Mike Mendel passed away. I am devastated. My heart breaks for his family.

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“I don’t know what I’m going to do without you by my side Mike,” he tweeted. “I’m destroyed.”

Fans of Rick and Morty, The Simpsons and other shows which Mike helped make flooded to the comments to share their condolences and tributes.

“I’m so sorry, Justin. For all of you,” one said. “Mike was a gem. This is awful.”

“Much love to you and the R&M family. This is devastating,” another wrote, while a third penned: “Rest in peace Mike Mendel. I will have his family in my prayers.”

Justin did not share any further information about Mike’s death.

The cause of death has not yet been reported.