Work is starting on a hydrotherapy pool being built by a Swansea charity with help from Catherine Zeta Jones.
Catherine Zeta Jones is the patron of the Longfields Association.
The actress has made a 'substantial' donation towards the mainly lottery funded project at the Longfields Day Centre in West Cross - just a mile from where she grew-up.
The pool, which will be used by adults with cerebral palsy and related conditions, should be completed by the end of the year.
The Lottery Community Fund has given £228,000 towards the scheme.
Zeta Jones has a long standing interest in the Longfields Association dating back to when she was a pupil at the old Dunbarton School in the city.
Project spokesman David Parry said work would start on the pool and extension to the day centre on Tuesday.
"It will take seven months to complete so will be ready for use at the start of next year," he said.
"Building costs for the hydro-therapy pool are £214,000.
"The Community Fund is providing a grant of £228,273 towards the building and running costs for the first three years.
"The Longfields Association is having to raise over £50,000 towards the project and is still fundraising to cover its outlay and future costs.
"It has received a substantial donation from Catherine Zeta Jones which has helped. She has a long standing relationship with Longfields dating back long before she became famous."
Mr Parry said the actress's father David Jones had dropped off a cheque on her behalf last year.
Zeta Jones, who is the patron of the Association, visited the centre on a trip back to Swansea with her husband-to-be Michael Douglas in October 2000.
At the time centre administrator Denise Lucas said: "She was very friendly and natural and chatted with everyone."
The pool will help centre users and others in the community with their muscle tone, movement and social interaction.