Kate Middleton makes her first public appearance since cancer diagnosis NBC Boston [Video]

Britain is putting on a display of birthday pageantry Saturday for King Charles III, a military parade that marked the Princess of Wales’ first public appearance since her cancer diagnosis early this year.

The annual event is also a show of stability by the monarchy after months in which both the king and Kate, wife of heir to the throne Prince William, have been sidelined by cancer treatment.

Kate announced Friday that she would attend the King’s Birthday Parade after making progress in her treatment. She disclosed in March that she was undergoing chemotherapy for an unspecified form of cancer.

“I am making good progress, but as anyone going through chemotherapy will know, there are good days and bad days,” Kate said in a statement, adding that she faces “a few more months” of treatment.

The 42-year-old princess was seen smiling in a horse-drawn carriage with her three children as …