Prince William began his new job as an air ambulance pilot on Monday at Cambridge Airport. The second-in-line to Britain's throne reportedly admitted that he is "feeling the nerves" as he takes on the new responsibility.

The Duke of Cambridge completed a civilian pilot course in September before training to take on the role with the East Anglian Air Ambulance (EAAA). The prince, who will donate his salary to charity, began his first shift alongside medical staff that could include responding to emergencies ranging from traffic accidents to heart attacks.

"It's my first day and I'm feeling the nerves," William reportedly said. "We're starting off on a wet Cambridge day, but I'm really looking forward to getting started.

"I feel doing a job like this really helps me to be grounded and that's the core of what I'm trying to become," William said, according to the Associated Press (AP). "I'm trying to be a good guy, to do what I can and trying to be a decent individual."

William will reportedly split his time as an EAAA pilot -- each shift is nine-and-a-half hours long -- with his royal duties.

"At the same time, there is a lot of responsibility, especially when George is around -- he's been a little monkey," he reportedly said. "It's no more difficult than what everyone else has to do."

William took an unpaid leave in April after he finished his first phase of training, and returned to his duties after Kate Middleton gave birth to Princess Charlotte, whom he described as "a little joy from heaven."