Former Portugal boss Carlos Queiroz has signed a three-year deal to take charge of the Iran national team.
Queiroz, who has also coached Real Madrid and had two spells as assistant to Sir Alex Ferguson at Manchester United, has signed a three-year deal with the Football Federation Islamic Republic of Iran (FFIRI).
He replaces Tehran-born US national Afshin Ghotbi, whose contract was not renewed after Iran were knocked out of the 2011 Asian Cup by South Korea.
Queiroz most recently held the post of Portugal boss but left following a 1-0 defeat against Norway in September.
He was also embroiled in controversy when he was banned for six months by the Portuguese Anti-Doping Agency for alleged misbehaviour during an anti-doping testing session before the World Cup - a sanction which was later overturned by the Court of Arbitration for Sport.