Mary Poppins Returns, โ˜…โ˜…โ˜…ย , Opening Wednesday, Dec. 19

Emily Blunt is pleasantly prim and proper in Mary Poppins Returns. She cuts a nostalgic figure, capturing the wit, whimsy, and elocution of the eponymous nanny, from her parrot-head umbrella to her clipped spit-spots and pish-poshes. Blunt doesnโ€™t have Julie Andrewsโ€™s vocal chops, but she can carry a tune.

Pleasant and nostalgic are the watchwords of director Rob Marshallโ€™s gauzy, inconsequential sequel, which again revolves around Mary Poppins being a delightful deus ex machina who arrives to save the strained relationship between a fussy Banks patriarch and his moppets. This time, itโ€™s Michael Banks (Ben Whishaw), all grown up and the father of three children. In lieu of Dick Van Dykeโ€™s cockney chimney sweep, Bert, we get Lin-Manuel Mirandaโ€™s cockney lamplighter, Jackโ€”Bertโ€™s former apprentice, weโ€™re told. As her mom was once a suffragist, the adult Jane Banks (Emily Mortimer) is a labor organizer. Ellen (Julie Walters) is still the housekeeper, and Admiral Boom (David Warner) is still blasting his rooftop cannon.

The film announces that itโ€™s set during The Great Slump (a few decades after the original Mary Poppins), but thereโ€™s little sign of widespread economic distress. Although the Fidelity Fiduciary Bank, apparently flush with tuppence, is foreclosing on the Banks home, thatโ€™s because of Michaelโ€™s blunder. Michael, a recent widower, works at the bank, whose president (Colin Firth) is secretly thwarting his attempts to get his house out of hock before Big Ben strikes midnight on Friday.

Even the musical sequences follow a derivative formula. Like the original film, Mary Poppins and the Banks children enter a cartoon universe, one of the new movieโ€™s standout scenes. Jack and his fellow lamplighters have a song-and-dance number called โ€œTrip a Little Light Fantastic,โ€ this filmโ€™s version of โ€œChim Chim Cher-ee.โ€ One departure is โ€œTurning Turtle,โ€ led by Meryl Streep as Poppinsโ€™s Eastern European cousin, the proprietor of a topsy-turvy fix-it shop. The segment is lively, but itโ€™s also utterly untethered from the narrative. While the Mary Poppins soundtrack gave us about half a dozen Sherman Brothers classics that remain indelible in pop culture, Mary Poppins Returns has several enjoyable toe-tappers you wonโ€™t readily recall tomorrow.

Miranda is a gifted musical performer who has a few show-stopping moments, but his acting is otherwise inert. He and Blunt exude minimal chemistry, and a flirtation between Jack and Jane is a half-baked subplot that goes nowhere. Indeed, the main cast is so reverential and referential that their performances feel trapped in amber. Itโ€™s both delightful and problematic when the film seems to spring to life only during one-offs by Streep, Angela Lansbury, and, yes, Dick Van Dyke (not reprising his role as Bert, however).

After five decades, itโ€™s a joy to finally revisit the world of Mary Poppins. But like a spoonful of sugar, the heady rush soon gives way to a comedown that leaves you craving something more satisfying.

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