The year was 1967 and, in a bid to regain control of her crumbling career, a 37-year-old Judy Garland accepted a residency at a London theater. And yet, the legendary actress, suffering from a drinking problem mixed with pill-popping to cure anxiety and insomnia, would sometimes show up on-stage completely inebriated. The film version of this historic London stay is portrayed in Rupert Goold’s “Judy,” a fine-as-it goes depiction that feels conventionally told. And yet, it’s driven by an exceptional performance from Renée Zellweger, who embodies the spirit of Garland in ways that are both illuminating and restrained. Safe for the performance itself, is there anything else noteworthy about the film? I wouldn’t have noticed if there was, mostly because Zellweger’s work here is so towering that it clearly overshadows everything else, including Goold’s more-than-decent direction. Renée better be ready for Oscar to call her come nomination day.