The Duke of Edinburgh is retiring from royal duties this autumn, Buckingham Palace has announced.
The decision was made by Prince Philip himself and is supported by the Queen, a palace spokesman said.
He will attend previously scheduled engagements between now and August, on his own and accompanying the Queen, but will not accept new invitations.
The prince - who turns 96 next month - carried out 110 days of engagements in 2016.
He is patron, president or a member of more than 780 organisations and will continue to be associated with them, but "will no longer play an active role by attending engagements", Buckingham Palace said.
In the statement, the spokesman said the duke "may still choose to attend certain public events from time to time."
He and the Queen celebrate their 70th wedding anniversary in November.