Patrice O'Neal. (Frederick M. Brown/Getty Images)

Known for his poignant, hilarious and, at times, controversial observations, O’Neal was a regular guest on several TV and radio shows, including “Tough Crowd With Colin Quinn” and “The Opie and Anthony Show.” He appeared in films, guest-starred on “The Office” and “Arrested Development,” and most recently helped grill Charlie Sheen during his Comedy Central roast.

Comedy Central has set up a tribute page to the comedian and will air his special, “Elephant in the Room,” tonight at 8 p.m. and again at midnight.

O’Neal’s death has triggered an outpouring of condolences, shock and grief from fans on his official Facebook page and on Twitter. On Tuesday’s “The Daily Show,” Jon Stewart paid tribute to the comedian during his “moment of zen” segment. Other comedians have been sharing their thoughts on Twitter.

Ricky Gervais: “One of my favourite stand up comedians. So sad. RIP.”

Kevin Hart: “I lost a great friend today! I also learned that tomorrow is never promised! #RipPatriceOneal.”

Kevin Nealon: “Patrice O'Neal. Patrice O'Neal. Patrice O'Neal. Patrice O'Neal. Patrice O'Neal. Patrice O'Neal. Patrice O'Neal. Can't say it enough. RIP.”

Patton Oswalt: “Yes, I’m serious. And very, very sad. #RIPPatrice.”

Colin Quinn: “Thanks to everybody for the Patrice ONeal comments. One of a kind. In heaven right now, charming half and infuriating half, then reversing.”

Questlove: “So grateful i got to see Patrice Oneal do his last NYC gig. man this is so devastating. he truly was one of my favorite comics. RIP Patrice”

Joe Rogan: “RIP to my friend Patrice O’Neal, a great thinker, a great comic, and a great human being. He had a truly unique perspective on this world.”

Sarah Silverman: “RIP Patrice O'Neal. You made us laugh til we cried.”

Donald Glover: “one of the funniest and smartest comedians ever. Rest in Peace Patrice O'Neal.”

Kevin Smith: “I shared some air & some air time with the man on O&A & he was always funny & thoughtful. Patrice - He WILL be missed.”

View Photo Gallery: The stand-up comic, known for his poignant and often controversial observations, died after complications from a stroke he suffered one month ago.

Watch O’Neal’s “Moment of Zen” segment below.

Watch O’Neal on “Late Night with Jimmy Fallon.”

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