(CNN)The appeal of “Judy” is as simple as its title — watching Renee Zellweger inhabit the role of Judy Garland near the end of her life in boozy, jittery, soaring fashion. There are virtually no surprises in this dutiful biography, which could easily be a sort of gender-switch “A Star is Born,” only with Garland portraying the aging superstar.Set in 1969 — three decades after she donned the ruby slippers — the movie opens with Garland and her children being ousted from the hotel where they’re residing, forcing the kids to move in with her ex, Sid Luft (Rufus Sewell), and Judy to grudgingly take a gig performing in London, seeking to restore her finances to a place where she can be their live-in mom again.”I’m unreliable, and uninsurable,” she says flatly, when someone suggests that she do another movie.Gett

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