Actress Catherine Zeta Jones is to become an ambassador for the National Society for the Prevention of Cruelty to Children.
The Oscar-winning star and mother-of-two will spearhead the charity's Full Stop appeal in her native Wales.
She said: "My childhood in Wales was a very happy one. However, I know that not all children are so lucky and I therefore want to do all I can, especially as a parent myself, to help keep them free from harm."
She added: "Wales is still my home and I am delighted to be part of the NSPCC's very important work across the country."
Zeta Jones and husband Michael Douglas have two children - Dylan, five, and Carys, two.
The actress has stayed close to her Welsh roots and recently built a £2 million home in Swansea, where she grew up.
The Full Stop campaign aims to end cruelty to children.
Launched in 1999, it hopes to raise £250 million for the cause.
Stanley Thomas, chairman of the Full Stop appeal in Wales, said: "I am thrilled that Catherine has decided to lend her support.
"With Catherine's help we can go forward to achieving our goal of creating a society where all children are loved, valued and able to fulfil their potential."
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