Wales internationals Jonathan Davies, Jake Ball and Gareth Davies have signed national dual contracts (NDC) with Scarlets Rugby and the Welsh Rugby Union.
National Dual Contract's are funded 40% by the Welsh region and 60% by the Welsh Rugby Union (WRU).
"It is hugely positive ... three experienced internationals are committing their futures to Welsh rugby," said WRU chief Martyn Phillips.
Gareth Davies has been influential for the Scarlets over the past few seasons, having signed his first NDC deal to go with his 10 tries in 29 Tests.
Jonathan Davies, regarded as one of the best outside centres in world rugby, has won 71 caps for Wales and was voted British and Irish Lions player of the series on the tour of New Zealand in 2017.
Lock Jake Ball, who is sidelined through injury following a dislocated shoulder suffered against Australia in November 2017, has played in 28 internationals and has taken up an option to remain with the Pro 12 champions.
"It is testament to the NDCs and the environment we are creating in partnership with the regions that Jake and Jonathan have both signed extensions to their NDCs," added Phillips.
"It is vital we retain our best talent for the future of our game on and off the field and Gareth signing an NDC for the first time is another important commitment."