Saracens have completed the signing of Australia lock Will Skelton on a short-term deal.
Sarries director of rugby Mark McCall confirmed back in October that Skelton was on the European and Premiership champions' radar.
The Waratahs second row will now link up with the London club after the Wallabies ended their tour of the northern hemisphere with a defeat against England at Twickenham last Saturday.
Saracens were short of second-row options after Maro Itoje and George Kruis suffered injuries, although the latter was able to feature for England against Argentina and Australia and the former made his comeback at Bath on Sunday, while Alistair Hargreaves also recently announced his retirement.
With the Six Nations on the horizon, 24-year-old Skelton will provide cover as Sarries, who missed out on South Africa's Eben Etzebeth, attempt to win yet more silverware.
McCall said: "We're delighted to be able to bring a player of Will's calibre into the group.
"He is an immensely talented rugby player with vast experience for a 24-year old tight-five forward. It's no secret that we have been running low on a few bodies in the second-row department but we made it very clear that we wouldn't compromise on quality when looking to add to our squad.
"In Will, we have a player who will certainly have an important role to play in our group over the next few months."