This is an alternately heartbreaking and fascinating account of the life and times of the immensely gifted Judy Garland - in her own words, on tapes destined to be made into a book which were all but forgotten until recently. And also portrayed by actress, Jennifer Jason Leigh in voiceovers, who for some odd reason affects an awful mid-Atlantic accent - what?! Did she think she was still portraying Dorothy Parker? To agree with another reviewer, it's the only downside to the documentary.
At first I thought it was Bobby Cannevale as Sid Luft, but Jon Hamm acquits himself exceptionally. Well-researched with archival footage and interviews.