She is known for starring in the films The Colour Room (2021), Fair Play (2023), and Inheritance (2025) as well as the first two series of the period drama Bridgerton (2020–2022).

[2] In 2016, it was announced Dynevor would be starring alongside Luke Pasqualino and Rupert Grint in Crackle crime comedy series Snatch, making her American television debut.

[9] In 2017, Dynevor joined the cast of the TV Land comedy-drama series Younger in the recurring role of Clare, Josh's (Nico Tortorella) Irish fiancée.

[18] Dynevor is set to star in the Sony Pictures thriller film I Heart Murder directed by Matt Spicer.

[26] She was originally attached to star in the romantic comedy The Threesome opposite Logan Lerman, but the roles were recast.

[27] and joined as Daphne Du Maurier in The Housekeeper [28] Dynevor is ambassador for ActionAid UK, an organisation that raises awareness for women and girls living in poverty around the world.