She won the 2018 BAFTA TV Award for Best Female Comedy Performance for playing Kerry Mucklowe in the BBC Three series This Country, which she co-created and co-wrote with her younger brother, Charlie Cooper.
[2][3] After one role as a young mother in ITV series Doc Martin she returned to the West Country, working as a cleaner with her brother Charlie.
In the same year, a pilot based on the Coopers' initial series pitch had been shot for ITV as the (never released) film Kerry, setting the basis for This Country.
[9] In 2019, she played Peggotty in The Personal History of David Copperfield and in 2020, she had a part in Armando Iannucci's HBO space comedy Avenue 5.
[19] Cooper claims to have experienced unexplained, possibly paranormal, phenomena at her home, to the extent that she moved house.