The Duke of Edinburgh and Queen Elizabeth's husband has been admitted to the hospital after he told doctors that he was not feeling well.

Buckingham Palace issued a statement Thursday confirming initial reports of his hospitalization.

Prince Philip was reportedly admitted to the private King Edward VII Hospital on Wednesday under the advisement of his doctors. Buckingham Palace said that the admission was a "precautionary measure."

The 99-year-old British royal family member will reportedly remain in the hospital for a few days for tests and observation. Sources with knowledge in the matter said that Prince Philip was brought to the hospital via his car and his admission was not an emergency.

Since he had retired from his public duties in 2017, Prince Philip has rarely been seen in public. The Duke, who is a former naval officer and avid polo player, has reportedly suffered from several health issues due to his old age.

In 2011, Prince Philip was rushed to the hospital via a helicopter after suffering from chest pains. He eventually had an operation to treat a blocked coronary artery. In 2017, Prince Philip was rushed to the King Edward VII Hospital again. In 2018, Prince Philip underwent a hip replacement.

The last time he was hospitalized was in December 2019. Buckingham Palace said during that time that he had visited the hospital for a planned treatment for a pre-existing condition.

Prince Philip was forced to give up driving in 2019 after he had crashed his Land Rover into another vehicle near Sandringham estate. The Duke walked away from the accident uninjured, but the driver of the other vehicle had to undergo treatment for a broken wrist.

During the country's forced lockdown at the height of the pandemic, Prince Philip spent most of the time with Queen Elizabeth at Winsor Castle in West London.

For much of his life, Prince Philip was relatively healthy and had no serious health issues. The longest-serving royal consort in British history married then Princess Elizabeth in 1947. He had a total of four children with the Queen. They both have eight grandchildren and nine great-grandchildren.