Michael Sheen is flying to Wales from Los Angeles today to visit the Welsh-based charity, Healing Wounds.
Sheen is patron for the charity which helps to support those in the armed forces and their families, as well as offering treatment for Post-Traumatic Stress Disorder.
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Stars of Team GB at this years' Olympics were in Wales today, as part of ITV's I Am Team GB campaign.
As Wales gets involved in the country's biggest sports day - Our Olympians have been getting in on the action.
ITV switched off all of its channels for an hour on Saturday as part of a national sports day event.