The 27 year-old full-back links up with City following the conclusion of her contract with Olympique Lyonnais, whom she won the UEFA Women’s Champions League with in late August.
And after a season in France, Greenwood makes her return to the Barclays FA Women’s Super League with City, penning a three-year deal and donning the number 27 shirt.
Speaking after signing on the dotted line, the 46-times capped England defender said: “I’m so excited to get going – it’s been a crazy and unforgettable few weeks, but I just can’t wait to get started and bring that winning feeling to City.
“I’ve learned so much about myself over the past 15 months by living away from home and in a different culture and environment, but it’s given me so much time to develop both personally and as a player.
“Now is the time for a new challenge though and having experienced such a successful campaign last season, when you get that taste for a winning mentality, it’s addictive and I just want to continue that with City.
“This Club has always impressed me with their success, how much importance they view the women’s game with and the players they attract, and it’s an environment I’m really looking forward to working in.”
Watch Alex's full first CityTV interview in the video above...