Oluwunmi Olapeju Mosaku (; born 31 July 1986), known professionally as Wunmi Mosaku, is a Nigerian and British actress. She rose to prominence for her roles as Joy in the BBC Two miniseries Moses Jones (2009) and Holly Lawson in the ITV series Vera (2011–2012). She won the BAFTA TV Award for Best Supporting Actress for her role as Gloria Taylor in the TV film Damilola, Our Loved Boy (2016). In 2019, she appeared in the fifth season of Luther, followed by her role as Ruby Baptiste in HBO's Lovecraft Country (2020). She portrayed the character Hunter B-15 in the Marvel Cinematic Universe (MCU) Disney+ series Loki (2021–2023) and reprised the role in the film Deadpool & Wolverine (2024). Mosaku was nominated for the BAFTA for Best Actress and won the BIFA for Best Performance by an Actress in a British Independent Film for her role as Rial in the film His House (2020). For her performance as Annie in the 2025 horror film Sinners, Mosaku won the Gotham Independent Film Award for Outstanding Supporting Performance and BAFTA Award for Best Actress in a Supporting Role, and was nominated for an Academy Award, a Critics' Choice Movie Award, and an Actor Award.