All 67 actors in both Riverdale and The 100
67 actors have appeared in both Riverdale and The 100, across 237 episodes. The most-credited is Greyston Holt, Glen Scot in Riverdale and Gavin / Marcus Kane II in The 100.
| Actor | In Riverdale | In The 100 | Eps | Eps |
|---|---|---|---|---|
| Greyston Holt | Glen Scot | Gavin / Marcus Kane II | 10 | 2 |
| Doralynn Mui | Joan Berkeley | Olivia | 14 | 1 |
| Alex Barima | Johnathan | Kwame | 12 | 3 |
| Chris Shields | Mr. Logan | David Miller | 1 | 11 |
| Jonathan Whitesell | Kurtz | Bryan | 5 | 10 |
| Eli Goree | Mad Dog | Wells Jaha | 13 | 4 |
| Alaina Huffman | Twyla Twyst | Nikki | 7 | 8 |
| Kendall Cross | Ranger | Major Byrne | 1 | 8 |
| Dean Marshall | Jack Walsh | Jae Workman | 1 | 10 |
| Karen Holness | Mrs. Logan | Blythe Ann Workman | 1 | 10 |
| Barbara Beall | Federal Prosecutor | Brell | 1 | 7 |
| Adam Lolacher | Mr. Manfred Muggs | Jeremiah | 2 | 8 |
| Ben Sullivan | Rick | Riley | 1 | 6 |
| Colin Lawrence | Coach Clayton | Rivo | 6 | 2 |
| Paul Lazenby | Manager, Inmate #1 | Rockline Warrior, Sidekick | 3 | 4 |
| Christian Sloan | Shady Man | Ambassador Uzac | 2 | 3 |
| Reese Alexander | Myles McCoy | Guard | 3 | 2 |
| Sharon Taylor | Tia Margot | Council Member #2 | 1 | 4 |
| Doug Chapman | Trash Bag Killer, Dennis | Big Arker | 3 | 1 |
| Thomas Nicholson | Trucker | Sanctum Prime Guard #1, Weak Grounder #1 | 2 | 2 |
| Hamza Fouad | Raphael | Terrorist Abductor | 3 | 2 |
| Link Baker | Captain Golightly | Ice Nation Ambassador | 4 | 1 |
| Luvia Petersen | Counselor Brooke Rivers | Sienna | 4 | 1 |
| Sean Quan | Boy Scout | Rex | 1 | 7 |
| Catherine Lough Haggquist | Mrs. Tate | Council Member #1 | 1 | 3 |
| Birkett Turton | David | Apprentice | 3 | 1 |
| David Lennon | Cameron Carver | Tarik | 2 | 3 |
| Gardiner Millar | General Taylor | Scarfaced Grounder | 3 | 1 |
| Glenn Ennis | Henchman #3 | Ryder, Machete | 1 | 4 |
| Todd Mann | Nico | Lead Guard | 4 | 1 |
| Garfield Wilson | Commandant Carter | Soldier | 1 | 3 |
| Adain Bradley | Trev Brown | Reese Cadogan | 2 | 1 |
| Beckham Skodje | Young Hal Cooper | Ethan Hardy (6 yrs) | 1 | 2 |
| Jeremy Jones | Debt Collector #1 | Robert | 2 | 2 |
| Skylar Radzion | Squeaky | Brooke / Josephine Lightbourne II | 2 | 2 |
| Mark Gibbon | Carl Martin | Grounder #1 / Bounty Hunter | 2 | 2 |
| Ben Cotton | Michael Matthews | Red | 1 | 2 |
| David Attar | Bruiser | Terro | 2 | 1 |
| Matthew Mandzij | Bouncer | Guard | 1 | 2 |
| Milli Wilkinson | Tiffany | Young Echo | 1 | 2 |
| Crystal Balint | Dr. Sherry Winters | Gemma Cadogan | 1 | 1 |
| Klarc Jerome Wilson | Officer Bradshaw | Disciple | 1 | 1 |
| Ian Butcher | Don | Bryson | 1 | 3 |
| Darcy Laurie | Shop Owner | Tybe | 1 | 1 |
| Lisa Chandler | Mrs. Conway | Observant Guard | 1 | 1 |
| Matteo Stefan | Slash | Del | 1 | 1 |
| Nisreen Slim | Restaurant Owner #1 | Grounder Mother / Dying Woman | 1 | 2 |
| Andre Tricoteux | Small Fry Boucher | War Chief #3 | 1 | 1 |
| Eric Bempong | Seaside Player | Teenaged Grounder | 1 | 1 |
| Marcus Aurelio | Townsfolk #1 | Angry Azgeda Warrior | 1 | 1 |
| Sean Owen Roberts | Edgy Gangster | Wayne Szybunka | 1 | 1 |
| Christiaan Westerveld | Slender Man | Adjustor | 1 | 1 |
| Jason Bell | Mr. Conway | Scar | 1 | 1 |
| Kathleen Duborg | Older Mother | August's Mom | 1 | 1 |
| Sean Millington | Hammer | Alpha Reaper | 1 | 1 |
| Teana-Marie Smith | Mail Clerk | Greedy Female Prisoner | 2 | 1 |
| Jaeson Lee | Berserker | Tomac | 1 | 1 |
| Jason William Day | Inmate #2 | Azgeda Warrior | 1 | 1 |
| Brad Bergeron | Bartender | Stevens | 1 | 1 |
| Glynis Davies | Miss Haggly | Elderly Azgeda Woman | 1 | 1 |
| Patrick Keating | Willie | Groundskeeper | 1 | 1 |
| Wyatt Cameron | Jock #1 | Guard | 1 | 1 |
| Dustin Lloyd | Deputy Walker | Sanctum Guard | 1 | 1 |
| Jay Clift | Gunman | Shield Guard Patrol #2 | 1 | 1 |
| Kelly McCabe | Boon | Team Six Leader | 1 | 1 |
| Kaiden Berge | Ghoulie #1 | Tech Savvy Miner | 1 | 1 |
| Matt Kennedy | L&L Fighter #1 | Jacov | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.