Australian loose forward Tala Gray gas signed a deal with Stade Francais ahead of next season.
The 27-year-old former Waratahs player has signed a two-year deal and will join from Toulouse, where he has spent the last three seasons.
French prop Stephane Clement, 30, will also join from Lyon on a three-year deal at the end of the season, Stade said.
The 2015 French champions Stade are currently in a lowly 11th place in the Top 14.
They are away to London Irish in the European Challenge Cup on Saturday but having lost two of their opening Pool Four matches face an uphill battle to defend the title they won last season.