Harris Wittels
The Parks and Recreation co-executive producer and frequent guest on IFC's Comedy Bang Bang died of a suspected drug overdose on Feb. 19, 2015, when he was only 30.
Robin Williams
The actor and comedian gained worldwide fame for his roles in movies like Mrs. Doubtfire, Good Will Hunting and Dead Poet's Society. However, the Oscar winner tragically passed away in his home at the age of 63 in 2014.
Chris Farley
The larger-than-life Saturday Night Live comedian starred in films like Tommy Boy, Black Sheep and Airheads. Farley died in 1997 of a drug overdose at the age of 33.
Gilda Radner
Radner garnered laughs as an original Saturday Night Live cast member for characters such as Roseanne Roseannadanna, and "Baba Wawa," her spoof of Barbara Walters, before dying of ovarian cancer in 1986.
Phil Hartman
A legendary scene-stealer from the late '80s and early '90s cast of SNL, Hartman created a slew of characters including Unfrozen Caveman, Frankenstein and the Anal Retentive Chef. His life ended in 1998 when he was tragically murdered at age 49 by his wife, who then committed suicide.
Bernie Mac
One of The Original Kings of Comedy, the Chicago-born comic starred as a hilariously grumpy version of himself in his titular sitcom The Bernie Mac Show, as well as appearing in such movies as Ocean's Eleven, Friday and Bad Santa. Unfortunately, he passed away in 2008 at age 50 due to complications from pneumonia.
John Belushi
The plus-sized funnyman shot to fame as an original cast member on Saturday Night Live after getting his start with The Titanic comedy troupe in Chicago. His life was tragically cut short when he accidentally overdosed on a combined injection of cocaine and heroin at L.A.'s Chateau Marmont.
Patrice O'Neal
The outsized funnyman kept America laughing through his appearances on a series of cable specials, including Comedy Central's Roast of Charlie Sheen. O'Neal died in 2011 from complications due to a stroke at the age of 41.
John Candy
The beloved comic actor first gained notice on Toronto's SCTV, before making a name for himself on the big screen in such comedies as Stripes, Splash, Uncle Buck and Planes, Trains and Automobiles. Candy, who had struggled with his weight for years, died in his sleep of a heart attack in 1994 at the age of 43.
Richard Jeni
The comic appeared in The Mask and several HBO and Showtime stand-up specials, but he was best known for his numerous appearances on The Tonight Show with Jay Leno. Jeni suffered from depression, which led him to take his own life with a self-inflicted gunshot.
Greg Giraldo
Best known for his stand-up specials and celebrity roast appearances on Comedy Central and serving as a judge on NBC's Last Comic Standing, the funnyman died in 2010 at 44 after overdosing on prescription medication.
Bill Hicks
A legend among comedians, the caustic comic got his start as a teen and was known for attacking society's worst impulses. Hicks burned brightly before his untimely death of cancer at age 32.
Mitch Hedberg
This stand-up artist was known for his hilarious wordplay, which got him booked on The Late Show with David Letterman and made him a hit on the comedy circuit. A series of albums soon followed but an ongoing drug habit finally led to a drug overdose in 2005.
Sam Kinison
Kinison caught America by surprise as the ill-tempered professor in 1986's Back to School, and his raucous take on the classic song "Wild Thing" was an MTV staple. However, his life ended abruptly in 1992 after he was killed in a collision with a teen driver who later pleaded guilty to one count of vehicular manslaughter with gross negligence.
Andy Kaufman
The notorious prankster earned a cult following in the late '70s for his ability to seamlessly slip into characters, but died at the age of 35 in 1984 from a rare type of lung cancer.
Lenny Bruce
The comic began his stand-up career in the 1950s, satirizing everything from race, abortion and drugs to religion, and died in 1966 at the age of 40 from an accidental morphine overdose.