Worcester Warriors director of rugby Dean Ryan has announced that the club have completed the signing of Jonathan Thomas from the Ospreys.
The 30-year-old, who has been capped 67 times by Wales, made 188 appearances for the Ospreys during his time with the club.
"We are delighted to secure a player of the quality of Jonathan Thomas. He has huge experience from his time with the Ospreys and Wales and is versatile and can operate right across the back five," Ryan told the club's official website.
"Jonathan is an extremely loyal and dedicated individual, underlined by the fact he has always been a one-club man with Ospreys. However, a new challenge at Warriors at this stage in his career is one that excites him.
"He has experience of building from the start, having been at Ospreys since their inception in 2003, and he can now look to help us build a bright and successful future here at Sixways."
Thomas has also won two Grand Slams with his country.