CELTIC have signed Dundee United winger Gary Mackay-Steven on a pre-contract agreement.
The 24-year-old international will join the club in the summer..
Mackay-Steven, who was the subject of two unsuccessful bids from Sheffield United, has been linked with the champions for several months.
He was thought to be on the verge of completing his move before the end of the current transfer window.
The entertaining touchline operator will give Ronny Deila the width he has been searching for in his team.
Mackay-Steven, who was capped three times with the Under-21s and has one full cap, began his career at youth level with Ross County, Liverpool and Fulham before starting as a pro with Airdrie United.
After one season with the Lanarkshire club he moved to Tannadice where he has been a regular in the first team over the past three-and-a-half years.
A club statement read: “Celtic are delighted to announce that Gary Mackay-Steven has signed a pre-contract agreement and he will join the club this summer.
“The 24-year-old made his first team debut for Dundee United back in July 2011 and he has gone on to make almost 130 appearances for the Tannadice side, scoring 27 goals. He has also been capped by Scotland.
“Everyone at Celtic welcomes Gary to the club.”