Oluwunmi Mosaku is a Nigerian-born British actress and singer. She is known for her roles as Joy in the BBC Two miniseries Moses Jones and Holly Lawson in the ITV series Vera (2011–12). In 2019, she starred in the fifth series of Luther and starting in 2021, has starred as Hunter B-15 in the Marvel Cinematic Universe (MCU) television series Loki, and reprised the role in the 2024 film Deadpool & Wolverine.

She won the 2017 BAFTA TV Award for Best Supporting Actress for her role as Gloria Taylor in the TV film Damilola, Our Loved Boy (2016). She was also nominated for the BAFTA and won for Best Actress and won the BIFA Award for Best Performance by an Actress in a British Independent Film for her role as Rial in the film His House (2020)