Britain's Prince William has hinted he would like to follow in the army-booted footsteps of his younger brother and fight on the front line.

But, as the future king, it's unlikely William would be exposed to the dangers faced by Prince Harry, who served in Afghanistan.

"I still remain hopeful there's a chance," William, who is currently training to fly search-and-rescue helicopters, told reporters. "I think as a future leader of the armed forces, it's really important you at least get the opportunity to be credible and to do the job I signed up for, as best I can. That's all I want to do."