The 23 year-old winger, who passed through all levels of Swansea Schools, Swansea RFC and Wales age group rugby, left for Cardiff in 2003, signing a two-year contract. However, having been given limited first-team opportunities, as well as being laid low by injuries, the young star has been eager to return to his home region.
Ospreys' Rugby Manager, Derwyn Jones, says: "Johnny is one of Welsh rugby's hottest prospects and his skills are perfectly suited to the type of open and exciting rugby we play at The Ospreys. When you consider how his former teammates Jonathan Thomas and Richie Pugh have progressed with us in the last few years, it's the perfect place for him to fulfil his potential."
Ospreys' joint-MD, Mike Cuddy, adds: "Signing a player such as Johnny is great news for the region and demonstrates our commitment to developing young Welsh talent. We're extremely excited about working with him as he's a quality player with the potential to become an Ospreys regular and a full Welsh international.
"Furthermore, his arrival also raises the competition for places to new levels which is vital if we want to continue developing a squad of players to challenge the very best in Europe."
Vaughton said: "The Ospreys are quickly becoming one of the most feared sides in Europe and trying to break into a team packed with so many international stars will be a massive challenge. Nevertheless, I'm confident that I have the ability to succeed and can't wait to start working with the coaches and the rest of the team."
Carmarthen Quins are holding an exhibition to commemorate club players who fought in World War I. All welcome to the clubhouse on Friday afternoon to learn more about local history, or share any family anecdotes or artifacts.
Defence coach Shaun Edwards believes Saturday's clash against England - the 'form team in world rugby' - poses a huge challenge for his side but he is confident, with Wales beginning to show the defensive qualities displayed in the last two World Cups,
Women in the Ospreys region recently completed a Level 1 coaching course and are looking forward to putting their theory into practice in clubs and schools across the region. A women only course has been organised for the Scarlets region starting next week, full details at the end of the video.