<em>Spoilers for Forward Unto Dawn episode 5 (last episode)</em>
So once the cadets were saved and boarded unto the pelican, Kelly was the first to remove her helmet. Upon doing so, one of the cadets ask her how old she is, to which she replies “That’s classified”.
So of course, we have to know.
No doubt she’s not to share because it’s rather mind boggling.
Forward Unto Dawn is based on the Battle of Circinius IV, which takes place in the year 2526.
Kelly, Fred and John (Fred being the male Spartan who unmasked himself as well), were all born in the year 2511.
Kelly was placed into the Spartan II program at age 6 in the year 2517. Add 9 years of training from age six and you get 15.
So there. Now you know in case you were wondering.
John, Jelly and Fred are 15 in Forward Unto Dawn.
This makes them one year older than Thomas Lansky, who was born August of 2512.