Bath will sign Wales back-rower Taulupe Faletau from Pro12 side Newport Gwent Dragons at the end of the season.
He had been set to join them in October but a move was blocked by Warren Gatland, his national team coach.
The Tonga-born 25-year-old has been capped 52 times by Wales, and represented the British and Irish Lions during the 2013 tour of Australia.
"It's great news for the club, he's signed for three years," Bath head coach Mike Ford told BBC Radio Bristol.
Faletau, who has been with Dragons since 2009, played four times as Wales reached the World Cup quarter-finals.
"The way Bath approach the game suits my style of play," he said.
"The opportunity to work with Darren (Edwards, Bath first-team coach) again after doing so with Wales Under-20s and the Dragons was also too good to turn down."
A Dragons statement said: "This comes as extremely disappointing news for the club given our understanding that a national dual contract was being negotiated with the Welsh Rugby Union (WRU)."