It was already established Phil Neville is to become a member of Moyes' backroom team but now Giggs will work alongside his former team-mate, having already agreed a one-year contract extension last term.
"It's a great privilege to be appointed a player coach. I hope I will be able to bring my experience to bear, having been both a player and part of the Manchester United family for so long," said Giggs.
Often linked with the United manager's job at some point in the future, Giggs has been taking his coaching badges and is due to attain the UEFA Pro Licence next summer.
"It's no secret that I have been taking my qualifications and I see this as the first step in my future career," said Giggs.
"I'm really looking forward to working alongside David and the team."
Source: PA
Source: PA