Robin Williams pays tribute to his best friend and comedic colleague, Billy Crystal, excerpted from the 2007 Kennedy Center Mark Twain Prize for American Humor.
| Name | Type | Role | |
|---|---|---|---|
| Bob Kaminsky | Writer | ||
| Peter Kaminsky | Writer | ||
| Allen Kelman | Producer | ||
| Madeleine Peyroux | Musical Guest | Herself | |
| Rob Reiner | Guest Star | Himself | |
| Robin Williams | Guest Star | Himself | |
| Whoopi Goldberg | Guest Star | Herself | |
| Paul Shaffer | Guest Star | Himself | |
| Martin Short | Guest Star | Himself | |
| Bob Costas | Guest Star | Himself | |
| John Goodman | Guest Star | Himself | |
| Barbara Walters | Guest Star | Herself | |
| Robert De Niro | Guest Star | Himself | |
| Jon Lovitz | Guest Star | Himself | |
| Danny DeVito | Guest Star | Himself | |
| Billy Crystal | Guest Star | Himself / Honoree | |
| Jimmy Fallon | Guest Star | Himself | |
| David Letterman | Guest Star | Himself | |
| Mark Krantz | Executive Producer | ||
| Michael Kaiser | Executive Producer | ||
| Cappy McGarr | Executive Producer | ||
| David S. Thompson | Executive Producer | ||
| Bob Kaminsky | Executive Producer | ||
| Dalton Delan | Executive Producer | ||
| Peter Kaminsky | Executive Producer | ||
| Christine Clark Bradley | Director | ||
| Bob Kaminsky | Creator | ||
| Peter Kaminsky | Creator | ||
| Mark Krantz | Creator |