Ma'am Darling: Ninety-Nine Glimpses of Princess Margaret is a 2017 book on the life of Princess Margaret, sister of Queen Elizabeth II, written by Craig Brown.

[1] It was published in the United States in 2018 as Ninety-Nine Glimpses of Princess Margaret.

[2] The book consists of "essays, lists, catalogues, diaries, palace announcements, newspaper cuttings and interviews, as well as parodies".

[1] The book won the 2018 James Tait Black Memorial Prize in the biography category.

[4] Speaking in 2019, Princess Margaret's close friend and lady-in-waiting Anne Tennant, Baroness Glenconner, described Ma'am Darling as "that horrible book, we won't mention the name of the somebody who wrote it.