What age were the McFly boys when they formed the band?

Answer:
When they formed in 2003;
Tom - 18
Danny - 17
Harry - 17
Dougie - 16.
They rose to fame the next year in March.
First answer by ID1443838625. Last edit by Thatrockchic. Contributor trust: 12 [recommend contributor recommended]. Question popularity: 18 [recommend question].