Fiji international centre Gaby Lovobalavu will join Wasps from Top 14 club Bayonne at the end of the season.
The former Toulon man will replace Bristol bound Alapati Leiua and Nick de Luca, who intends to retire at the end of the current campaign.
Lovobalavu says he is relishing the opportunity to step out of his comfort zone at the Ricoh Arena next season.
"I have really enjoyed my time with Bayonne and I am excited about the new challenge in England next season," said Lovobalavu in a statement on Monday.
"Wasps are a very ambitious club and I was attracted by the attacking rugby they play, which is a pleasure to watch.
"I am excited by the chance to train in a world-class environment, with world-class players and I'm looking forward to really challenging myself every day, taking myself out of my comfort zone."
Wasps director of rugby Dai Young believes Lovobalavu's versatility will prove to be useful in the backline.
"We're very pleased to have signed another player of Gaby's quality," said Young.
"Gaby's comfortable playing 12 or 13, which will give us more options, particularly during the international period.
"He's got really explosive power onto the ball, as well as good pace and the agility and footwork to beat defenders.
"He carries really well and has huge physicality and dynamism in defence. We expect his physicality to really complement the pace we already have in our backline."
Wasps currently lead the Aviva Premiership by six points ahead of closest rivals Exeter Chiefs.