Queen Elizabeth II
The Queen said Prince Philip had "quite simply, been my strength and stay all these years".
The Queen joined the procession to the chapel in the state Bentley, following behind the walking members of the Royal Family and staff.
She married the duke in 1947, five years before she became Queen on the death of her father King George VI.
Her constant companion, the duke was the longest-serving consort of any British monarch. He retired from royal duties in 2017 having completed more than 22,000 solo engagements.