The Queen watched the service from a separate balcony from her family members, alongside her lady in waiting, Mrs Susan Rhodes.
Her Majesty wore five poppies pinned to her black coat, which are said to represent each service in the war: the Army, the Navy, the RAF, the Civil Defence and women.
In photos released by Buckingham Palace on Saturday, the monarch was pictured wearing a face mask for the first time in public, as she made a deeply personal visit to the tomb of the unknown warrior at Westminster Abbey.
MORE: Prince Harry reveals touching reason why he wears a poppy