Heledd was the lead candidate for Plaid Cymru in the 2026 Senedd Election for the constituency of Pontypridd Cynon Merthyr. Prior to the election she served as a Member of the Senedd for South Wales Central, representing communities across Rhondda Cynon Taf, Cardiff, and the Vale of Glamorgan.

After the election she was apointed to the role of Trefnydd and Minister for Culture and Sport in the Welsh Government.

Her home is the beautiful town of Pontypridd, where she lives with her husband and their son. She grew up in Ynys Môn (Anglesey), and then went to study History and Political Science at Trinity College Dublin. There, she was elected Education Sabbatical Officer for the Students' Union and the following year, she was elected to the same role for the Union of Students in Ireland. She later returned to Wales to complete a master’s degree in Medieval History at Bangor University.

Her career began working with the Plaid Cymru group in Westminster before she joined Amgueddfa Cymru – National Museum Wales. Prior to the 2021 election, she served as Head of Policy and Public Affairs, leading on governance, strategy, international relations, and stakeholder engagement. She has also served on the Board of the Museums Association, chairing its Ethics and Nations committees.

In 2017, she was elected to represent Pontypridd on both Rhondda Cynon Taf Council and Pontypridd Town Council. She has led and supported several major local campaigns – from demanding an independent inquiry into the devastating 2020 floods, to helping save the A&E unit at the Royal Glamorgan Hospital, and standing against disruptive changes to local schools.