While COVID-isolated, I binge-watched Ryan Murphy's "Hollywood", a hypothetical look at what US entertainment could've been had people stood up to racism and homophobia in the 1940s. A couple of episodes depict George Cukor, and one episode mentions "A Double Life". A few days after watching that episode I saw the movie in question. It's an intense one, with Ronald Colman (in an Oscar-winning role) as a thespian who lets his performance gain too much control of his existence. It's impressive how, in these movies focusing on stage performances, the play can sometimes come across as more intense than the person's life, as happens in this movie.
It's not a masterpiece, but Colman puts on one of the most haunting performances of all. I definitely recommend it