She then went on to appear in Cleansed[3] directed by Sean Holmes at the Arcola Theatre and in Michael Grandage's production of John Gabriel Borkman[4] for the Donmar Warehouse where Ian McDiarmid and Penelope Wilton headed the cast.
Diveney portrayed Colette in the premiere of Frank McGuinness' play Greta Garbo Came to Donegal[6] at the Tricycle Theatre alongside Michelle Fairley and Angeline Ball.
Then appeared in the premiere of A Thousand Stars Explode in the Sky[7] by David Eldridge, Robert Holman and Simon Stephens at the Lyric Hammersmith.
Diveney appeared as series regular Kate Travers in the ITV1 Drama Injustice[8] where she played the on-screen daughter of James Purefoy and Dervla Kirwan.
[14] In 2023, she reunited with Matthew Dunster to play Ruth in his production of Harold Pinter's The Homecoming[15] at The Young Vic, starring alongside Jared Harris and Joe Cole.