All 102 actors in both Arrow and Once Upon a Time
102 actors have appeared in both Arrow and Once Upon a Time, across 326 episodes. The most-credited is David Nykl, Anatoly Knyazev in Arrow and Fisherman in Once Upon a Time.
| Actor | In Arrow | In Once Upon a Time | Eps | Eps |
|---|---|---|---|---|
| David Nykl | Anatoly Knyazev | Fisherman | 36 | 1 |
| David Anders | Cyrus Vanch | Dr. Victor Frankenstein / Dr. Whale | 1 | 15 |
| Kacey Rohl | Alena Whitlock | Megara | 12 | 1 |
| Tiera Skovbye | Madison Danforth | Robin / Margot | 1 | 10 |
| Christie Laing | Carly Diggle | Maid Marian, Woman | 6 | 7 |
| Jarod Joseph | Alan Durand | Billy, Gus | 3 | 8 |
| Bruce Blain | Pyotr Roslov | Desk Sergeant | 1 | 9 |
| Ryan Robbins | Conklin | Sir Morgan | 9 | 1 |
| Jesse Hutch | Officer Daily | Peter | 6 | 1 |
| Wil Traval | Christopher Chance / Human Target | Sheriff of Nottingham / Keith | 2 | 5 |
| Jason Burkart | Lowlife | Little John | 1 | 10 |
| Liam Hall | Joseph Wilson | Prince | 5 | 1 |
| Tristan Jensen | Oliver's Security Detail, Bodyguard | Horatio | 5 | 1 |
| Paul Lazenby | Inmate, Mr. Robbins, Thug | Claude, Black Knight No. 1, Mirror-Carrying Knight | 3 | 4 |
| Artine Brown | Hendrick Von Arnim | Arresting Cop | 3 | 1 |
| Nicholas Lea | Mark Francis | Michael Tillman/woodcutter | 3 | 1 |
| Sandy Wayne Robson | Security Guard #1 | Perp | 1 | 3 |
| Dalias Blake | Bank Guard, SWAT Leader | Palace Guard | 2 | 1 |
| Edward Foy | William Glenmorgan | Black Knight, Lead Knight | 1 | 2 |
| Jennifer Cheon | Officer Jones | Nurse | 5 | 1 |
| Nisreen Slim | Reporter | Doctor Andrea Sage | 3 | 2 |
| Gaalen Engen | Judge McGarvey | Bar Patron | 3 | 1 |
| Kam Kozak | Mirakuru Soldier | Black Guard | 1 | 1 |
| Marcus Rosner | Max Fuller | Jurgen | 2 | 2 |
| Chad Riley | Cop #1, ESU Officer, Halcones Gangbanger | Black Knight #2 | 4 | 1 |
| Aleks Paunovic | Felton | Berkley | 2 | 1 |
| Alex Zahara | Anthony Venza | Midas | 1 | 2 |
| David Bloom | FBI Boss | Mr. “K” Krzyszkowski | 1 | 2 |
| Giacomo Baessato | Colton | Grif, Sleeping Man | 1 | 2 |
| Yurij Kis | Oleg | Igor | 1 | 2 |
| Howard Siegel | Manny | Tavern Owner | 1 | 1 |
| Mark Gibbon | Ops Leader | Head Troll | 1 | 2 |
| Ty Olsson | Martin Somers | Hordor | 1 | 1 |
| Warren Christie | Carter Bowen | Ryan | 1 | 1 |
| David Quinlan | Reporter #4 | father | 2 | 1 |
| Peter Ciuffa | Dragos Ibanescu | Deli Owner | 2 | 1 |
| David Cubitt | Mark Shaw | Robert | 1 | 1 |
| Ernie Hudson | General Roy Stewart | Poseidon | 1 | 1 |
| Everick Golding | Bill | Rapunzel's Father | 1 | 1 |
| Jordan Schartner | Carl | Sailor | 1 | 1 |
| Julian Haig | Uni #1 | Prince Gregor | 1 | 1 |
| Leana Yu | Laughing Woman | Woman Customer | 1 | 1 |
| Luke Camilleri | Sam Hackett | Stephen | 1 | 1 |
| Mike Carpenter | Michael Ancona | Guard #2 | 1 | 1 |
| Peter Bryant | Richard Ford | Jailer | 1 | 1 |
| Rick Dobran | Alec Tarkov | Raskind | 1 | 1 |
| Evans Johnson | Nurse | Nun #1 | 2 | 1 |
| Andrew Kavadas | James Midas | Baron Danglars | 1 | 1 |
| Darren Moore | Mouthpiece | Vortigan | 1 | 1 |
| Donna Soares | SCPD Detective | Nurse | 1 | 1 |
| John DeSantis | Reaper Tattoo | The Dove | 2 | 1 |
| Nelson Wong | Rich Kannon | Paramedic | 1 | 1 |
| Noah Beggs | Drunk Guy | Man, Mob Guy | 1 | 2 |
| Nick Hunnings | Task Force Leader | Peasant, Prison Guard | 1 | 2 |
| Thomas Cadrot | Officer | Bartender | 2 | 1 |
| Adam Lolacher | Klaus Markos | Black Knight #2 | 1 | 1 |
| Darcy Laurie | Bo Travis | Louie | 1 | 1 |
| Donny Lucas | Customs Agent | Sad-Eyed Man | 1 | 1 |
| Hesham Hammoud | Uni | Crewman | 1 | 1 |
| Jason Simpson | Boss | Adda | 1 | 1 |
| Lucas Wolf | League Assassin | Armed Escort | 1 | 1 |
| Matt Kennedy | Shooter | Boyfriend | 1 | 1 |
| Max Montesi | Kendrick Weller | Peasant Boy | 1 | 1 |
| Patrick Roccas | MP #3 | Arendelle Guard #2 | 1 | 1 |
| Primo Allon | Osborne | Gadling | 1 | 1 |
| Richard Stroh | Security Guard #1 | Edgar | 1 | 1 |
| Tony Alcantar | Pharmacist | Cashier | 1 | 1 |
| Garfield Wilson | Ripped | Guard | 2 | 1 |
| Ryan Booth | Peter Yorke | Man | 2 | 1 |
| Andre Tricoteux | Gora | Argyle, Massive Brawler | 1 | 2 |
| Anthony F. Ingram | Accountant | Clerk | 1 | 1 |
| Duncan Ollerenshaw | John Nickel | Royal Doctor | 1 | 1 |
| Evan Frayne | Jared Swanstrom | Customer | 1 | 1 |
| J.C. Williams | A.R.G.U.S. Agent | Lead Guard | 1 | 1 |
| Karen Holness | Jana Washington, Untouchable #1 | Witch of the North | 2 | 1 |
| Marc-Anthony Massiah | Agent Kosinski | Portland Cop | 1 | 1 |
| Raf Rogers | HIVE Scientist | Arendelle Servant | 1 | 1 |
| Toby Levins | Eric Dunn | Sergeant | 1 | 1 |
| Todd Thomson | Minister | Businessman | 1 | 1 |
| Chris Loubardeas | Jackal #2 | Reveling Soldier | 1 | 1 |
| Colin Corrigan | Volunteer | Strumpet Thug | 1 | 1 |
| Gavin Cooke | Pirate | Drunken Lout | 1 | 1 |
| Ian Butcher | Ezra Barnes | Burly Knight | 1 | 1 |
| Lee Majdoub | Gholem Qadir | Sir Kay | 1 | 1 |
| Lee Tichon | Controller | Guard | 1 | 1 |
| Mary Alison Raine | Mother | Customer #2 | 1 | 1 |
| Paula Giroday | Allison Lee | Trish | 1 | 1 |
| Rick Tae | Triad Accountant | Doctor | 1 | 1 |
| Jim Shield | Keating | Royal Guard | 1 | 1 |
| Maria Marlow | Cop's Wife | Woodcutter's Wife | 1 | 1 |
| Sage Brocklebank | Desk Guard | Sir Gaston | 1 | 1 |
| Steve Makaj | Josiah Hudson | Captain | 1 | 1 |
| King Lau | Hideo Yamane | Ticket Carny | 1 | 1 |
| Shaun Omaid | Bouncer | Street Vendor | 1 | 1 |
| Ben Wilkinson | Paul Copani | Hank | 1 | 1 |
| Tarun Keram | Intern | Emir | 1 | 1 |
| Jesse Blue | Prisoner | Black Knight | 1 | 1 |
| Michael Adamthwaite | Torque | Alistair | 1 | 1 |
| Charles Zuckermann | Petrov | Black Knight #1 | 1 | 1 |
| Michasha Armstrong | Merlyn Security #2 | Guard | 1 | 1 |
| James Bamford | Gunman #2 | The Black Knight | 1 | 1 |
| Olson Lloyd | Bertinelli Thug #2 | Toll Operator | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.