It will be Giggs's first permanent managerial post and he succeeds fellow former Wales international Chris Coleman.
Ryan Giggs scored 12 goals in 64 appearances for Wales spread over 16 years between 1991 and 2007 and said he would love to succeed Chris Coleman.
The legendary sprinter retired from athletics at the World Championships.
Ronaldinho and Ryan Giggs were in Pakistan on a two-day visit with five other international stars to play in two exhibition matches in Karachi and Lahore organised by the Leisure League.
Pakistani organisers said they hope to promote football, and also signal that security has improved in militancy-plagued Pakistan.
Ronaldinho, along with seven other football stars, will play two exhibition ties in Karachi and Lahore this weekend.
Ryan Giggs' Mumbai 5s had little trouble against a Kolkata 5s team that failed to capitalise on the chances it created in the opening exchanges of the game
Manchester United legend Ryan Giggs said that India could take a few lessons from Wales, who shocked the footballing world by making the Euro 2016 semis earlier this month
Ryan Giggs' Mumbai lost to Kochi in their second match of the Premier Futsal League. They had defeated Chennai 4-2 in their first match
Ryan Giggs' Mumbai beat Chennai 4-2 in the first match of the Premier Futsal League, while Ronaldinho's Goa lost 2-4 to Hernan Crespo's Kolkata
Premier Futsal league will get off to a rocking start with maestro A.R. Rahman's live show at Chennai's Nehru Stadium
Ryan Giggs, Ronaldinho, Deco have all been lined up to take part in the inaugural edition of the Indian Premier Futsal League, that begins from July 15
Manchester United legend Ryan Giggs was taken aback by Cristiano Ronaldo's brilliance when he saw the Portuguese winger play for the first time during a friendly between the English giants and Sporting Lisbon in 2003
After 29 years at Manchester United, where he won 13 league titles and two European Cups as a player, Ryan Giggs has ended his association with the club
Ryan Giggs has played more times for the club than anyone else in history and is its most decorated player, having won every major honour in club football
Wales defeated World No.2 Belgium in the quarter-finals to set up a last four clash against Portugal in Euro 2016.
After 29 years at Manchester United, where he won 13 league titles and two European Cups as a player, Ryan Giggs is set to end his association with the club
Manchester United F.C. manager Louis van Gaal finds himself in severe danger of being axed halfway through his three-year contract after the English club's miserable six-match winless run saw them suffer an embarrassing Champions League exit and slip out of the Premier League's top four.