Crystal Palace confirmed the signing of Joe Ledley from Celtic with just minutes to spare on a hectic transfer deadline day for the club.
The 27-year-old agreed terms on a three-and-a-half-year contract after flying to London from Glasgow late in the day.
Palace faced an anxious wait for Premier League approval after chairman Steve Parish announced the deal had been done on Holmesdale Radio.
But the Eagles soon confirmed on their website that the signing had been ratified, and Ledley is now tied to the club until the end of the 2016/17 season.
A Palace statement read: "Ledley brings plenty of experience to SE25, having played Champions League football and won two Scottish Premier League titles during his three-and-a-half seasons at Parkhead.
"The Welsh international began his career at Cardiff City, progressing through the club's youth ranks and making more than 250 appearances for the Bluebirds after making his senior debut in September 2004.
"He went on to win the Wales Club Player of the Year award in 2007 and 2008, and was also named in the PFA Championship Team of the Year in 2008/09.
"Ledley's contract ran out at the end of the following season and, despite attracting interest from a host of English clubs, he opted to move north of the border to sign for the Glasgow giants.
"He played a total of 153 games for the Hoops in all competitions, scoring 30 goals from midfield."
Ledley would have been out of contract in the summer, and Celtic boss Neil Lennon was happy to cash in on the player rather than let him leave on a free transfer.
The fee was not disclosed, but Sky sources suggest the deal was worth in the region of £800,000.
Speaking to Sky Sports News, Ledley welcomed his switch to south London.
"I'm just glad to get it over and done with and look forward to the new challenge ahead," he said.
"I reported at the training ground today at Celtic and spoke to Neil Lennon, made my decision and came down, caught the next flight and managed to come here in time.
"Obviously I had a fantastic time at Celtic, three-and-a-half years and my challenge now is to play in the Premier League and I look forward to it. It's every boy's dream. I'm just over the moon to have got it done and look forward to the challenge ahead.
When asked about the opportunity of working with manager Tony Pulis, he said: "Yeah he's been brilliant. He tried to sign me before at Stoke and it didn't work and finally to work under him now, I'm looking forward to doing that.
"He's a fantastic manager and has proven that at this level."