Rooney revealed the news on Twitter by announcing: "Just to confirm to all my followers I have had a hair transplant. I was going bald at 25 why not."
The Manchester United striker said that he was "delighted" with the results, and that he had the treatment at a clinic on London's Harley Street.
Rooney also asked his followers for a decent hair gel and that his head was "still a bit bruised and swollen".
Coleen Rooney also confirmed the news by tweeting: "Hiya!! Yes waynes had his hair done! His own decision not me asking him, like alot are saying!! Pleased for him and it will look great. [sic]"
Rooney's teammate Rio Ferdinand joked: "Just don't go down the wearing a alice band route!! You'll be doing head&shoulders adverts soon! Hope its gone ok Good luck lad."
Michael Owen had previously teased Rooney about his lack of hair, tweeting in May: "How old are you in that photo? Your face looks like a 12 year olds but your hair looks like a 60 year old!"
Other stars that have admitted to having hair transplants include sportsmen Graham Gooch and Austin Healy, and Monty Python legend John Cleese.
Wayne Rooney has admitted that footballers must expect intrusion from the press.