| Rami Malek | Elliot Alderson |
| Carly Chaikin | Darlene |
| Portia Doubleday | Angela Moss |
| Martin Wallström | Tyrell Wellick
(credit only) |
| Christian Slater | Mr. Robot |
| Gloria Reuben | Krista Gordon |
| Michel Gill | Gideon Goddard |
| Michael Cristofer | Phillip Price |
| Ron Cephas Jones | Romero |
| Susan Pourfar | Penelope |
| Armand Schultz | Michael Hansen |
| BD Wong | Whiterose |
| Stephanie Corneliussen | Joanna Wellick |
| Richard Bekins | James Plouffe |
| Azhar Khan | Mobley |
| Sunita Mani | Trenton |
| Eric Martin Brown | Salesman |
| Nadia Gan | Elizabeth |
| Olli Haaskivi | Shelter Tech |
| Qurrat Ann Kadwani | Interviewer |
| Kaitlin Large | Coworker |
| Aidan Liebman | Young Elliot |
| Adrian Matilla | Huge Guy |
| Kareem Savinon | Kareem |
| Vaishnavi Sharma | Elliot's Mother |
| Brett G. Smith | Police Officer
(as Brett Smith) |
| Shinzo Abe | Self
(archive footage) (uncredited) |
| Joe Biden | Self
(archive footage) (uncredited) |
| Jack Hammel | Restaurant Patron
(uncredited) |
| Jacqueline Honulik | Cocktail Waitress
(uncredited) |
| Jeh Johnson | Self
(archive footage) (uncredited) |
| Margo Kazaryan | Protester
(uncredited) |
| John Kerry | Self
(archive footage) (uncredited) |
| Keith Mackler | Protester
(uncredited) |
| Theresa May | Self
(archive footage) (uncredited) |
| Angela Merkel | Self
(archive footage) (uncredited) |
| Ismaelpeter Casillas Nelson | Skateboarder
(uncredited) |
| Barack Obama | Self
(archive footage) (uncredited) |
| Rachel Emma Slack | Shopper
(uncredited) |