- Karl Urban as Billy Butcher
- Jack Quaid as Hughie Campbell
- Antony Starr as Homelander
- Erin Moriarty as Starlight
- Dominique McElligott as Queen Maeve
- Jessie T. Usher as A-Train
- Laz Alonso as Mother's Milk
- Chace Crawford as The Deep
- Tomer Capon as Frenchie
- Karen Fukuhara as The Female
- Nathan Mitchell as Black Noir
- Colby Minifie as Ashley Barrett
- Claudia Doumit as Victoria Neuman
- Jensen Ackles as Soldier Boy
- Aya Cash as Stormfront
- Laila Robins as Grace Mallory
- Giancarlo Esposito as Stan Edgar
- Cameron Crovetti as Ryan Butcher
- Langston Kerman as Eagle the Archer
- Katia Winter as Little Nina
- Sean Patrick Flanery as Gunpowder
- Miles Gaston Villanueva as Supersonic
- Nick Wechsler as Blue Hawk
- Laurie Holden as Crimson Countess
- Matthew Edison as Cameron Coleman
- Season Three had been greenlit by Amazon ahead of the season two premiere; this news was revealed at SDCC 2020.
- Season 3 will introduce Soldier Boy and Supersonic. The latter is Starlight's ex-boyfriend and will drive a wedge between her and Hughie.
- Season 3 is currently in the works. Filming is expected to commence in early 2021.
- Eric Kripke gave some information about this season:
- Soldier Boy is "Homelander before Homelander". He is a huge celebrity of America and Homelander will feel really threatened.
- The audience learn more about Kimiko's interests.
- Love Sausage might come back again.
- Stormfront is still alive and mutilated. Aya Cash expressed that she will be back if the showrunners call her back.
- There will be a Herogasm. It will the main event of the sixth episode of the season.
- Starlight becomes a rising star among The Seven, but things will "go to shit pretty quickly".
- Ryan Butcher will be a part of Season 3. Butcher will keep tabs on him and the two will have interactions.
- Black Noir may take off his mask.
- Antony Starr expressed that Homelander in Season 3 will be a "Homicidal Maniac".
- ‘The Boys’ Renewed for Season 3 at Amazon; Season 2 Will Feature Weekly After-Show
- ‘Supernatural’s’ Jensen Ackles Joins ‘The Boys’ Season 3
- ‘The Boys’: Katia Winter To Play Cult Role From Comics In Season 3 Of Amazon Series
- The Boys season 3 casts Dexter and Revenge stars as new superheroes
- 'The Boys': Laurie Holden To Recur In Season 3 Of Amazon Series
- Eric Kripke's Twitter
- Black Noir May Take Off His Mask in The Boys Season 3