| Thomas Middleditch | Richard Hendricks |
| Josh Brener | Nelson 'Big Head' Bighetti |
| Martin Starr | Bertram Gilfoyle |
| Kumail Nanjiani | Dinesh Chugtai |
| Amanda Crew | Monica Hall |
| Zach Woods | Donald 'Jared' Dunn |
| Matt Ross | Gavin Belson |
| Suzanne Cryer | Laurie Bream |
| Jimmy O. Yang | Jian Yang
(credit only) |
| Chris Diamantopoulos | Russ Hanneman |
| Scott Prendergast | Scott |
| Rogelio T. Ramos | Executive
(as Rogelio Ramos) |
| Keye Chen | Dang |
| Ben Feldman | Ron LaFlamme |
| Tzi Ma | Yao |
| Chris Williams | Hoover |
| Tony Winters | Mayor Wilkins |
| Chris Aquilino | Danny |
| Eric Bradley | Goldbriar Choir Singer |
| Ben Bram | Goldbriar Choir Singer |
| Alvin Chen | |
| Bob Joyce | |
| Guy Maeda | Goldbriar Choir Singer |
| Kausar Mohammed | Nadia |
| Bill New | |
| Tarina Pouncy | Stephanie |
| Jasper Randall | Goldbriar Choir Singer |
| Rachel Rosenbloom | Becky |
| Aaron Sanders | Holden |
| Fletcher Sheridan | Goldbriar Choir Singer |
| Jeff Smith | Goldbriar Choir Singer |
| Mark Edward Smith | Jose |
| Krishna Smitha | Priyanka Singh |
| Gary Stockdale | Goldbriar Choir Singer |
| Gerald White | Goldbriar Choir Singer |
| Vanessa Beck | Tesla Sales Rep
(uncredited) |
| Nicholas Mazzone | Rally Member
(uncredited) |