Michelle Denise Greenidge is a British actress. She is known for portraying the roles of Valerie in the Netflix comedy drama After Life (2019–2022), Lola Okonedo Akimbo in the BBC Two comedy Mandy (2020–present), PC Williams in the police comedy drama Code 404 (2020–2021), Rosa Babatunde in the Channel 4 drama It's a Sin (2021) and Carla Sunday in the BBC sci-fi series Doctor Who (2023–present).