Josh Lewsey has interrupted his retirement to answer an SOS call from Wasps by signing a short-term contract with the London club.
Lewsey, who has been working full-time as a management consultant at an accountancy firm, has committed himself to Adams Park until the end of the season.
The 34-year-old has been recruited to provide cover in the back three following an injury to winger Tom Varndell, while knocks to other players could cause further problems.
It is almost two years since the World Cup winner retired, but he is eager to assist the club.
"This isn't a long-term thing but after playing in a couple of recent charity games, (interim director of rugby) Leon (Holden) and (head coach) Shaun Edwards contacted me to see if I could assist the club for the remainder of the season," he said.
"If they think I could positively contribute to my old club in any way - be it on the field or around the dressing room on match days - then I'd be happy to do so."
Lewsey enjoyed a trophy-laden decade at Wasps that included four Aviva Premiership titles and two Heineken Cups.
He was a key contributor to the most successful period in the club's history and was equally influential for England, scoring 22 tries in 55 caps.
Holden insists Lewsey is the ideal solution to the club's injury problems.
"This is a fantastic short-term signing and I have no doubt Josh will make a huge contribution to the squad in what's left of the season," said Holden.
"Josh has been playing some charity games lately and he's kept himself in remarkably good shape in the two years since he retired.
"We have had a few knocks to players in our back three in recent weeks and with Tom Varndell out for a longer spell we really do need some cover.
"We don't think we could have done any better than bringing someone like Josh back to the club."