It's a genuinely interesting documentary. It’s not due to Barnaby Thompson bringing anything strikingly new to the topic, but rather his skillful use of a vast collection of historical footage related to this mysterious figure, and the inclusion of Rupert Everett lending his charm to read passages from Coward’s journals—journals that were carefully written over the course of his adult years. Having begun life in humble circumstances, Coward resided with his parents while his mother worked tirelessly managing a boarding house. Similar to a friend he would later have in Charlie Chaplin, one senses that this difficult early existence fostered a strong desire to achieve success in him, despite his limited formal education. From performing as a child to writing plays, the United States, Britain and Jamaica all served as sources of inspiration as he steadily became the highest-paid writer globally. Naturally, there were setbacks and disappointments along the way, but this film consistently highlights a remarkable strength of character within the man. Alan Cumming touches on his homosexuality in the narration; however, compared to someone like Sir John Gielgud, Coward’s extreme caution regarding that part of his life meant there's not much detail available. We are simply aware that he was gay; it never became a defining element of how he presented himself publicly. The breadth and quality of the archival material showcase both the man’s talents and an appealing sense of self-importance, and anyone with even a passing interest in the evolution of music, theater, film, or comedy—all areas where this individual had a significant impact—should find it enjoyable.

Source on TMDB