The Diamond Queen is a BBC documentary series, presented by Andrew Marr, which looks at the life of Queen Elizabeth II. The series focuses on her accession, her daily routine, how she is seen as a role model, and how she coped in her 60th year as monarch. The programme features archive footage of the Queen, as well as in-depth footage of her major engagements since the beginning of 2010 to late 2011.

In the opening episode of the series, Marr looks at the Queen's relationship between her parents, grandparents and uncle as well as her relationship with the government and with the current and previous Prime Ministers. He follows the Queen as she tours the United States and the Middle East and visits the Queen's Wendy House Y Bwthyn Bach, received as a present on her sixth birthday and recently restored.