The Witcher: Sirens of the Deep is an adaptation of the short story, A Little Sacrifice, by Andrzej Sapkowski, a movie spin-off set between episodes 5 and 6 of the first season of the live-action series. It debuted on Netflix on February 11, 2025.The latest Netflix feature brings Geralt and Jaskier deeper into the Continent after investigating attacks in a seaside town, only to uncover a long-standing conflict between humans and merpeople. While the adaptation put its own spin on The Witcher tale, it also brings recognizable faces and voices from the live-action series and the games, including long-time Geralt of Rivia voice actor Doug Cackle, along with new voice actors.Here are the official cast members lending their voices to The Witcher: Sirens of the Deep characters.Primary voice cast in The Witcher: Sirens of the DeepDoug Cockle as Geralt of RiviaDoug Cockle voices Geralt (Image via Netflix)Voice actor Doug Cockle returns as the man behind Geralt's voice in The Witcher: Sirens of the Deep. He's behind the legendary gravelly-voiced mutated monster-hunter, famous for his white hair and yellow eyes.Doug Cockle was in the movie London Voodoo and the TV series Band of Brothers but is best known for his works in video games like Horizon Zero Dawn, Victor Van, and Baldur's Gate 3. He also voiced Geralt in the video game The Witcher 3: Wild Hunt.Anya Chalotra as Yennefer of VengerbergAnya Chalotra voices Yennefer (Image via Netflix)The ABC Murders' Anya Chalotra joins the cast of the movie adaptation as Yennefer, a powerful sorceress and Geralt's romantic partner. Their complicated relationship is a key plot in the Witcher universe.Anya Chalotra was in the TV series Wanderlust and did voice work for Sherwood as Robin Loxley and Sif in Twilight of the Gods. She played Yennefer in the Netflix live-action series for 23 episodes.Joey Batey as JaskierJoey Batey voices Jaskier (Image via Netflix)The Riot Club star, Joey Batey, joins the cast list of The Witcher: Sirens of the Deep as Jaskier. He is a bard and Geralt's loyal friend and is known for his taste for the ginger things in life, including fashionable clothes.Joey Batey can be seen in Knightfall, Bloody Cakes, and Netflix's The Witcher, where he played Jaskier. Batey also guest-starred in Billy the Kid, Lucky Man, and The War of the Worlds.Emily Carey as Sh'eenazEmily Carey voices Sh'eenaz (Image via Netflix)Geek Girl's Harriet Manner actress Emily Carey voices Sh'eenaz in The Witcher: Sirens of the Deep. Her character is described as a young mermaid who fell in love with a human, Agloval, and contemplated drinking a potion to become human and marry him.Fans can see more of Emily Carey's roles in Breaking Point, The Lost Girls, Casualty, and Anastasia. She also played the young Diana in Wonder Woman and the young Lara in Tomb Raider.Christina Wren as Essi DavenChristina Wren voices Essi (Image via Netflix)Will Trent star Christina Wren also joined The Witcher: Sirens of the Deep cast as Essi, aka Little Eye. She's a bard like Jaskier, and they are childhood friends. She is also Geralt's other love interest in the film.Christina Wren played the recurring role of JP Cutler in L.A. Macabre from 2014 to 2020, and she also appeared in Hicksters, Lazarus, Cross, and Batman v Superman: Dawn of Justice.Other voice cast in the movieThe rest of the voice cast and their characters in the movie are as follows:Mallory Jansen as Melusina and Princess NispenCasmrus Johnson as human prince AglovalSimon Templeman King Usveldt of the seaside kingdom of BremervoordRay Chase as ZelestCynthia Kaye McWilliams as Queen DahutRamon Tikaram as King BasimKari Wahlgren as Zmarra and Vodnik AssassinStephen Fu as DerouaGeorge Ackles as DrouhardBrian George as Barkeep and HeraldMaury Sterling as BeratDarin De Paul as CaptainGreg Vinciguerra as Young ZelestValerie Rose Lohman as Young EssiBrittany Ishibashi as Seal Woman and Essi's sisterRy Chase as LachlanWatch The Witcher: Sirens of the Deep and similar movies and shows now on Netflix.