Wales international Dan Evans has agreed a three-year contract with the Ospreys.
The Ospreys have announced that the Newport Gwent Dragons full-back will move from Rodney Parade at the end of this season.
Swansea born Evans, 25, won two caps on Wales' tour to North America in 2009 where he started in the wins over Canada and USA.
"This is a great opportunity for me," he told the club's official website.
"The Ospreys have been the most successful team in Wales over the last 10 years, winning leagues and producing players for the national team.
"There is some real world-class talent in the squad so it's a big challenge for me personally, but I can't wait to get involved and fight for my place."
Andy Lloyd, Rugby Operations Manager at the Ospreys, said: "We are delighted to have been able to secure the services of a talented Welsh player who has been in eye-catching form over the last two seasons.
It's great news for the region that he wanted to come here.
"We believe that Dan is a good fit for us, the way that our back line is developing around a group of players who may be young in age but are gaining a lot of experience and are starting to mature as a collective.
"He's been a regular points scorer over the last few years and while we believe that we can help him reach that next level, he can also give us some focus at the back and create some real competition for the shirt."