he is 15
Fiona the Human? Well, according to the show in Cartoon Network, Adventure Time, it is said that Finn the human (main character of Adventure Time) is 500 years old. So, if you choose a picture where Finn the Human and Fiona the Human is there, you'll see that Finn and Fiona are the same height. So, Fiona the Human must also be 500 years old. If you're talking about a different Fiona, then I'm not the guy you should be asking...
Pat Finn is 55 years old (birthdate: July 24, 1956).
Finn Kalvik is 64 years old (birthdate: April 30, 1947).
William Finn is 59 years old (birthdate: February 28, 1952).
Craig Finn is 45 years old (birthdate: August 22, 1971).
He is 13 years old
On Glee, Finn Hudson was 16 years old. However, he was played by actor Cory Monteith, who was 27 when the first episode aired and 31 when he died in 2013.
UK actor Finn Cole is 22 years old (born November 9, 1995).
Finn Harries, along with his twin brother Jack, is 24 years old (birthdate May 13, 1993).
Elijah Wood was around nine years old when he portrayed Huckleberry Finn in the 1993 film "The Adventures of Huck Finn."
1 years old
Fiona the Human? Well, according to the show in Cartoon Network, Adventure Time, it is said that Finn the human (main character of Adventure Time) is 500 years old. So, if you choose a picture where Finn the Human and Fiona the Human is there, you'll see that Finn and Fiona are the same height. So, Fiona the Human must also be 500 years old. If you're talking about a different Fiona, then I'm not the guy you should be asking...