| Year | Award | Category | Nominated work | Company/Theatre | Result | Ref. |
| 2015 | Stephen Sondheim Society | Student Performer of the Year Award | Follies | Garrick Theatre | Won | |
| 2017 | BroadwayWorld UK Awards | Best Actress in a New Production of a Musical | Junkyard | Bristol Old Vic | Nominated | |
| Manchester Theatre Awards | Best Actress in a Studio Production | Wish List | Royal Exchange Studio | Won | |
| 2019 | Screen Actors Guild Awards | Outstanding Ensemble in a Drama Series | The Crown | Netflix | Won | |
| 2020 | Won | |
| Newport Film Festival | Breakthrough Artist Award | Won | |
| 2022 | Diva Awards | Actor of the Year | Chloe | BBC | Nominated | |
| 2025 | Gotham TV Awards | Outstanding Supporting Performance in a Limited Series | Adolescence | Netflix | Nominated | |
| Astra TV Awards | Best Supporting Actress in a Limited Series or Streaming Movie | Nominated | |
| Primetime Emmy Awards | Outstanding Supporting Actress in a Limited or Anthology Series or Movie | Won | |
| 2026 | Critics Choice Television Awards | Best Supporting Actress in a Limited Series or Movie Made For Television | Pending | |
| Golden Globe Awards | Best Performance by a Female Actor in a Supporting Role on Television | Pending | |