A deal has been finalised to bring the 160-strong United States athletics team to Birmingham for the London Olympics in 2012.
Council Leader Mike Whitby and leaders of the United States team signed the papers at a ceremony on Thursday.
US team boss Doug Logan said the city was "an excellent place to call home".
The athletes, together with a large number of team officials, will arrive in the city to start training about four weeks ahead of the games.
They will also be based in the city throughout the Games.
Leaders in Birmingham and the US have been liaising for more than two years over the move.
The council, alongside the US team's representatives, have also been looking at possible security issues.
A number of sporting arenas in the area will be made available to them for training and members of the US team will also visit schools in ambassadorial roles.
It is hoped the team's arrival will give sporting venues in Birmingham a boost and plans have been mooted for athletes from the Birchfield Harriers club to test themselves against the Americans.