Hollywood stars Catherine Zeta Jones and Michael Douglas are donating a five-figure sum to help fund Wales' first children's hospital.
Michael Douglas drives a golf buggy at Celtic Manor
The couple are in Wales to play a celebrity charity golf tournament in Newport over the weekend.
Zeta Jones is a patron of the Noah's Ark Appeal which has been raising money for the hospital in Cardiff.
The couple have also nominated the charity to benefit from their share of the proceeds from the golf tournament.
Zeta Jones and Douglas have been staying in her home city of Swansea to practice for the golf tournament - the All Star Cup - which will be played at the Celtic Manor Resort in Newport and will be shown on Sky One.
The couple have been spotted driving around the city in her mother's silver Skoda car.
The keen golfers agreed to take part in the tournament which has been hailed as a celebrity version of the Ryder Cup.
Douglas' US side will be captained by Mark O'Meara, while Colin Montgomerie heads the European team which Zeta will play in.
The idea was dreamed up by TV presenters Ant McPartlin and Declan Donnelly, who are executive producers.
Catherine Zeta Jones will donate proceeds from the golf match
Zeta Jones has been reported as suffering pre-tournament nerves: "It's such an unpredictable game. I'm just praying to the golf gods."
As part of the tournament, the competitors will nominate a charity to benefit from their efforts.
Lyn Jones, chairman of trustees of the Noah's Ark Appeal said: "We're thrilled that Catherine and Michael have nominated the Noah's Ark Appeal as their chosen charity in the tournament.
"And we are truly grateful for their generous donation, which will make a huge difference to many Welsh children."
The charity will use the donation to make inroads into the £300,000 needed to complete the Teenage Cancer Trust Unit at the new hospital which opened to its first patients in February.
Up to 200 teenage cancer patients will be treated at the new unit.
The Noah's Ark Appeal was launched in May 2000 and has the support of a number of celebrities including former England cricketer Ian Botham and Welsh stars Charlotte Church and Shirley Bassey.
The appeal plans to continue to support the hospital and the families who will use its facilities.