Humphries attended
London Academy of Music and Dramatic Art and has appeared on stage in productions of
Temple at the
Donmar Warehouse,
Pomona at the
National Theatre and
Blackout Songs at the
Hampstead Theatre. She is also the author of the memoir
Why Did You Stay? published in 2022. Humphries' comedy television roles have included
Friday Night Dinner and ''
Morgana Robinson's The Agency. She played Julie Fincham in the Amazon Prime Video series Ten Percent, a British remake of Call My Agent!'', in April 2022. In 2023, Humphries portrayed
Carrie Johnson in the
Channel 4 docu-drama
Partygate. Previously, she had portrayed
Carol Thatcher in the television drama series
The Crown. Also in 2023, she started filming
Ben Wheatley comedy-horror series
Generation Z. ==Personal life==