This image released by Universal Pictures shows Cynthia Erivo, left,...

This image released by Universal Pictures shows Cynthia Erivo, left, and Ariana Grande in a scene from the film "Wicked." Credit: AP

It’s the ultimate celebrity redemption tour, two decades in the making. In the annals of pop culture, few characters have undergone an image makeover quite like the Wicked Witch of the West.

Oh, she may have been vengeful and scary in “The Wizard of Oz.” But something changed — like, REALLY changed — on the way from the yellow brick road to the Great White Way. Since 2003, crowds have packed nightly into “Wicked” at Broadway’s Gershwin Theatre to cheer as the green-skinned, misunderstood Elphaba rises up on her broomstick to belt “Defying Gravity,” that enduring girl-power anthem.

How many people have seen “Wicked”? Rudimentary math suggests more than 15 million on Broadway alone. And now we have “Wicked” the movie, director Jon M. Chu’s lavish, faithful, impeccably crafted (and nearly three-hour) ode to this origin story of Elphaba and her (eventual) bestie — Glinda, the very good and very blonde. Welcome to Hollywood, ladies.

Before we get to what this movie does well (Those big numbers! Those costumes!), just a couple thornier issues to ponder. Will this “Wicked,” powered by a soulful Cynthia Erivo (owner of one of the best singing voices on the planet) and a sprightly, comedic, hair-tossing Ariana Grande, turn even musical theater haters into lovers?

Tricky question. Some people just don’t buy into the musical thing, and they should be allowed to live freely amongst us. But if people breaking into song delights rather than flummoxes you, if elaborate dance numbers in village squares and fantastical nightclubs and emerald-hued cities make perfect sense to you, and especially if you already love “Wicked,” well then, you will likely love this film. If it feels like they made the best “Wicked” movie money could buy — well, it’s because they kinda did.

Much credit for that goes to Chu, who has said he spent so many years working on “Wicked” that three of his five children were born during that span. Chu clearly has musical theater in his DNA, as we already knew from “In the Heights.” His actors don’t break awkwardly into composer Stephen Schwartz’s famous pop-show tunes: they run headlong into them, and sometimes blow the roof off with them.

Another question: Will people be turned off when they see “To Be Continued” at the end, after two hours and 40 minutes, realizing they must wait a year for Part 2? Also tricky. Surely this COULD have been one movie. But then, how would they have followed “Defying Gravity,” which brings down the Act 1 curtain (and the house) in the show? It’s hard to imagine just continuing with the plot.

This image released by Universal Pictures shows Cynthia Erivo in...

This image released by Universal Pictures shows Cynthia Erivo in a scene from the film "Wicked." Credit: AP

Yes, the plot: We begin with Grande’s Glinda descending on Munchkinland in her glistening bubble, which since 1939 has been upgraded with a comfy sofa, to announce that, indeed, the wicked witch is dead.

But someone challenges Glinda: Is it true you were her friend? Well, er, yes, Glinda replies carefully. Their paths did cross — back at school.

Cue opening day at Shiz University. Glinda — well, for now, Galinda “with a ga” — an aspiring sorcery major, arrives in her pink suit looking like mix of Grace Kelly and Elle Woods. She already has a fan base and a private suite.

Also arriving is Elphaba there to help her sister, Nessarose (Marissa Bode) settle in. The students are horrified at her green skin. But when imperious Madame Morrible (Michelle Yeoh), dean of sorcery at Shiz, gets a glimpse of Elphaba’s unharnessed magical powers, the green girl becomes her prized student.

This image released by Universal Pictures shows Cynthia Erivo, left,...

This image released by Universal Pictures shows Cynthia Erivo, left, and Ariana Grande in a scene from the film "Wicked." Credit: AP/Giles Keyte

Elphaba hopes her sorcery lessons will lead to a meeting with the all-powerful Wizard of Oz, whose glorified head is carved into the campus and who, she secretly hopes, will grant her wish to be “de-greenified.” She sings of this wish in “The Wizard and I,” a lovely number introducing Erivo’s uniquely supple vocals.

Another upbeat number, “What is this Feeling?," introduces the “loathing, unadulterated loathing” between Elphaba and Glinda, forced to room together. These early songs have a zippy appeal, and the best is “Dancing Through Life,” a bang-up dance number that showcases the rakish charm of local prince Fiyero (Jonathan Bailey of “Bridgerton,” dripping with charm) who proudly urges fellow students to join him in his shallowness.

“Life’s more painless, for the brainless,” sings Bailey, accompanied by acrobatic dancers on huge, coordinated “tornado wheels” in a fabulous library. “Life Is fraught less, when you’re thoughtless.” Fiyero will develop into something different in Part 2. For now, he woos Glinda and strikes up a friendship with Elphaba.

But “Wicked” is about female friendship, and the sudden, surprising bond between polar opposites Glinda and Elphaba — chirpy vs. deep, pink-clad vs. black-clad. In the delightful makeover song “Popular,” Galinda's tour de force, Grande swings from the chandelier, kicks like a can-can dancer, and gallivants around a to-die-for bedroom set that includes pink-sequined shoes popping out of nowhere.

Erivo’s tour de force? That would be “Defying Gravity,” the show’s huge signature song, coming as the mood has changed into something far more ominous. Both young women are in the Emerald City, where they — or at least, Elphaba, have discovered that the wizard is not powerful and beneficent, but, more like, well, Jeff Goldblum — charming and weak, with a big, dark secret.

“So if you care to find me,” belts out Elphaba, having discovered the power of her broomstick, “Look to the western sky.” Where, exactly, is she going?

Hold that thought. For exactly one year.

“Wicked,” a Universal Studios release, has been rated PG by the Motion Picture Association “for some scary action, thematic material and brief suggestive material." Running time: 160 minutes. Three stars out of four.

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