In 2010, she was nominated for a BAFTA Cymru award for Best Actress in the Welsh language TV drama, Caerdydd.
Since 2013, she has starred in the Welsh detective series Y Gwyll (titled Hinterland in English), the first bilingual Welsh-English series to air on the BBC. Since 2016, she has presented the crime documentary series Y Ditectif.
Harries is married to Welsh actor Matthew Gravelle. She appears alongside Matthew in Baker Boys but both are married to other characters in the series. They appear as husband and wife in the S4C drama Un Bore Mercher in 2017, which was aired on BBC One Wales in 2018 in an English-language version as Keeping Faith.
