Four days before his death, the John F. Kennedy Center for the Performing Arts had named Carlin its 2008 Mark Twain Prize for American Humor honoree.[73] The prize was awarded in Washington, D.C. on November 10, making Carlin the first posthumous recipient.[74] Comedians honoring him at the ceremony included Jon Stewart, Bill Maher, Lily Tomlin (a past Twain Humor Prize winner), Lewis Black, Denis Leary, Joan Rivers, and Margaret Cho.
| Name | Type | Role | |
|---|---|---|---|
| Bill Maher | Guest Star | ||
| Margaret Cho | Guest Star | ||
| Lily Tomlin | Guest Star | ||
| Lewis Black | Guest Star | ||
| Denis Leary | Guest Star | ||
| John Stewart | Guest Star | ||
| Joan Rivers | Guest Star |