Catherine the Great is a British-American miniseries in four parts written by Nigel Williams and directed by Philip Martin for Sky Atlantic and HBO Miniseries. It stars Helen Mirren as the titular Catherine the Great.The miniseries premiered in its entirety on 3 October 2019 on Sky Atlantic in the United Kingdom. It debuted on 21 October 2019 on HBO in the United States. The show was also distributed worldwide by Sky Vision.