“I’ve absolutely loved my time at Saracens and have made some friends for life,” explained Reading-born Willis, whose brother Jack plays for French club Toulouse.
“I will continue to give everything for this club for the remainder of the season and I’m very excited about what this squad can achieve.”
The Telegraph, external has reported that Willis is set to rejoin Bordeaux-Begles, having left them for Saracens in January 2023.
Saracens director of rugby Mark McCall said he is “disappointed” by Willis’ desire to leave but respected the player’s “decision to pursue a new challenge”.
“He [Willis] has made a great impact on the field and been a popular team-mate off it,” McCall added.
“I know he is determined to give everything to the group over the coming months.”