Movie review: Teen star outshines Natalie Portman in disappointing 'Vox Lux'

“Vox Lux” - ★ ★

Natalie Portman is the putative headliner in “Vox Lux,” an ambitious but ultimately ungraceful meditation on pop superstardom that spans decades, awkwardly weaving themes of school shootings, terrorism, obsessive fandom and post-traumatic stress into the psychological portrait of a singer whose career was born of tragedy.

But she is not the real star.

Like a true rock diva, Portman shows up late in the show. Playing the 31-year-old Celeste, an abrasive, troubled and substance-abusing arena-pop performer with a controlling manager (Jude Law), millions of fans and a generic-sounding catalog of songs (written by singer/songwriter Sia), Portman arrives on-screen 45 minutes after the opening credits.

Ultimately, she gets upstaged by Raffey Cassidy, who plays her character at 14, in the film's far more mesmerizing prologue.

That prologue opens in 1999 Staten Island with an act of horror: Celeste (Cassidy) is shot in the neck by a classmate, who goes on to slaughter a roomful of high school music students, and himself.

After recovering from a spinal injury, she and her older sister, Eleanor (Stacy Martin), perform a spontaneous, heartfelt song at a candlelit memorial service. Their tune, with one lyric slightly tweaked, becomes an anthemic hit for a nation in search of healing.

And the rest, as they say, is history - not to mention a cliché. Celeste becomes a household name, and Eleanor, who writes her songs, a Staten Island homebody.

But it's the prehistory here that fascinates. Celeste rides a rocketing trajectory that will be familiar to anyone who has seen “A Star Is Born.” Jetting to Sweden for a recording session and to Los Angeles to shoot a music video, Celeste finds time to grow up a little in between, briefly entertaining a fling with a fellow musician. These scenes avoid melodrama, with the actor-turned-filmmaker Brady Corbet crafting a story that, at least in its first act, feels provocative and scrupulously unhackneyed.

Then Portman appears, in a scenery-chewing turn that is meant to be a tour de force - and some will surely call it that - but that feels less authentic than histrionic. Most inexplicable, the 31-year-old Celeste feels utterly unconnected to the 14-year-old character played by Cassidy, who also does double duty as Celeste's teenage daughter, Albertine. Those scenes not only highlight the tensions between mother and daughter, but also the resentment between sisters: Eleanor stayed home to raise Albertine, while Celeste toured the globe.

You may find yourself asking: Where did the other Celeste go? It's not just a question of physical casting, but acting choices, including a prominent Outer Borough accent that Portman affects, but that Cassidy never uses. It's unclear what has happened to make the adult Celeste - angry, needy, emotionally abusive - so different from her sweeter adolescent self, even allowing for the effects of trauma and the toll of celebrity. A narrator (Willem Dafoe) fills in some of the gaps, but not enough of them.

More important, where did that other movie go? “Vox Lux,” which takes its name from Celeste's sixth album, never does anything with its most intriguing themes: the commodification of tragedy and the hollowness of fame.

<b>Starring:</b> Natalie Portman, Raffey Cassidy, Jude Law, Stacy Martin

<b>Directed by:</b> Brady Corbet

<b>Other:</b> A Neon release. Rated R for language, violence and drug use. 112 minutes