The Football Association have confirmed Roy Hodgson as the new England manager.
The 64-year-old has signed a four-year deal, taking him to the end of Euro 2016.
Hodgson will remain in charge of West Brom for the final two games of the Premier League season, although he will be released for England duties as required.
"The Football Association is delighted to announce the appointment of Roy Hodgson as England manager," said an FA statement.
"Joining from West Bromwich Albion, Hodgson has agreed a four-year deal to become the full-time manager of the Three Lions.
"Hodgson, aged 64, who has won a total of eight league titles in a distinguished career, and coached the national teams of Switzerland, Finland and the United Arab Emirates, met with FA officials at Wembley on Monday.
"Having taken Switzerland to the FIFA World Cup in 1994 - their first Finals competition for 28 years - Hodgson also achieved a FIFA ranking of third in the world as well as successfully qualifying the team for Euro 96.
"His former clubs include Inter Milan, Blackburn Rovers, Grasshoppers, FC Copenhagen, Fulham and Liverpool. He has also managed in Norway and Sweden.
"In addition, he has been a regular member of FIFA and UEFA's technical study groups at tournaments.
"Along with his vast experience of international and European football, Hodgson is the only English manager currently working in the top flight to have won the League Managers' Association manager of the year award."
West Brom are now stepping up their search to find a new manager after Hodgson opted to end his 15-month spell in charge.
Baggies chairman Jeremy Peace said: "Roy's appointment as England manager is obviously disappointing news for the club as we would have liked him to sign a new contract, which was in the process of negotiation, and remain as our head coach.
"But we understand Roy's desire to take the England job and he will leave us after the Arsenal game on May 13 with our best wishes.
"Of course, with Euro 2012 around the corner, we appreciate that some of Roy's focus over the next 12 days will be on England matters.
"But we are delighted he will be seeing the season out with us.
"With the help of the coaching staff, he will prepare the team in his usual, meticulous manner as we finish what has already been a successful season."
Peace added: "The board will now concentrate on the important task of appointing a new head coach to continue our project as we prepare for a third successive season in the Barclays Premier League.
"We did not want Roy to leave and he will be a tough act to follow.
"But I want to reassure our supporters that we will do everything possible to identify and appoint the right head coach for this football club.
"I would also like to thank the FA Chairman, David Bernstein, for the sensitive and professional manner in which he has liaised with me in bringing about Roy's appointment.
"Everyone here would like to wish Roy, The FA and England all the best for Euro 2012 and beyond."