Middlesbrough have completed the signings of Celtic trio Barry Robson, Willo Flood and Chris Killen.
Scotland international Robson has joined for an undisclosed fee while Flood and Killen are both free transfers.
Robson has signed a two-and-a-half-year contract, Flood's runs until 2011 and Killen's deal lasts to this summer.
Boro boss Gordon Strachan knows the players, who have all passed medicals, well from his time at Parkhead.
The trio have already started training with their new team-mates and are in contention to make their debuts against Sheffield United.
Their arrivals came as Boro confirmed that Egypt midfielder Mohamed Shawky has joined Turkish club Kayserispor on a free transfer.