Harris Wittels, a comedian, writer and executive producer of comedy show Parks and Recreation, has been found dead at his Los Angeles home.
Police are investigating his death as a possible drug overdose, but the coroner's office will determine the cause.
The 30-year-old also wrote for The Sarah Silverman Program and created the Twitter term #humblebrag.
Silverman paid tribute calling him "brilliant beyond compare".
"He was my baby. I just keep thinking of Superman flying backwards around the Earth. I wish I could do that. I'm so mad at you Harris," she tweeted.
Only hours before Wittels died he performed onstage at The Meltdown Show in Hollywood.
The comedian started as a writer on Parks and Recreation but worked his way up to become a producer and then executive producer. The sitcom's final show will be broadcast in the US on 24 February.
Wittels also appeared on Parks and Recreation in minor roles - in one episode he played an employee of Pawnee's Animal Control.
Parks and Recreation star Amy Poehler spoke about Wittels' death at an event where she was honoured for her charity work.
"Today, I lost a friend, I lost a dear, young friend in my life who was struggling with addiction. I'm sharing it with you because life and death live so close together, and we walk that fine line everyday," she told the audience.
Fellow Parks and Recreation star Rob Lowe has also paid tribute on Twitter saying: "Goodbye Harris Wittels, you were so funny and so sweet. It's a pleasure to have known you."
Mindy Kaling was also among the many comedians paying tribute.
"Harris was so funny. He could have the most devastating observation but say it in a sweet and boyish way. I will miss him," she said.
The 30-year-old, who had spoken openly about his battle with drug addiction and his time in rehab, was well known for his creation of the hashtag #humblebrag on Twitter.
His #humblebrag Twitter feed had more than 250,000 followers and sparked a book - Humblebrag The Art of False Modesty - which Wittels admitted he wrote while on drugs.