Megan Tremethick is a Cornish actress, filmmaker, writer, and producer. She is best known for her role as Queen Ginnarra in The Reign of Queen Ginnarra (2025), directed by Lawrie Brewster, as well as for playing the Sorceress Nemain in Hex Studios' 80s-inspired sword & sorcery film The Slave and the Sorcerer (2024), also directed by Brewster. Megan also played Nicole in The Vance Institute (2023) alongside Hannah New, Angelina in Howard J. Ford's The Lockdown Hauntings (2021) starring Candyman (1992)'s Tony Todd, and Sandy in the paranormal chiller Ghost Crew (2022).

Megan started performing in theatre from an early age before transitioning to screen acting. She pursued her passion for film by participating in BFI Film Academy's Chalk (2016).