Joe Ledley has joined Crystal Palace from Celtic on a three-and-a-half-year deal.
The midfielder was offered a new contract at Celtic Park, but has opted to sign for Tony Pulis's side instead.
Ledley moved to Glasgow in 2010, following six years at Cardiff City, and won three league titles and a Scottish Cup.
He joins Thomas Ince, Scott Dann, Jason Puncheon and Wayne Hennessey as deadline-day signings at Selhurst Park.