This image released by Fox Searchlight Pictures shows Dev Patel in a scene from the film “The Personal History of David Copperfield.”

This image released by Fox Searchlight Pictures shows Hugh Laurie, left, and Dev Patel in a scene from the film “The Personal History of David Copperfield.”

This image released by Fox Searchlight Pictures shows Dev Patel, from left, Rosalind Eleazar and Hugh Laurie in a scene from the film “The Personal History of David Copperfield.”

This image released by Fox Searchlight Pictures shows Morfydd Clark, left, and Dev Patel in a scene from the film “The Personal History of David Copperfield.”

This image released by Fox Searchlight Pictures shows Hugh Laurie, from left, Dev Patel and Hugh Laurie in a scene from the film “The Personal History of David Copperfield.”

It’s not hard to draw a straight line from Charles Dickens to Armando Iannucci. In each there’s a passion for human frailty and absurdity, and, above all, a richness of people. Nobody filled pages with a vivid cast of characters like Dickens, so who better to take a shot at “David Copperfield” than the man behind the teeming ensembles of “Veep,” “In the Loop” and “The Death of Stalin”?

In his third film as director, following his farce of bumbling and bloody Kremlin power struggles, Iannucci has turned to Dickens’ most quintessential and autobiographical novel with the same zeal he previously reserved for political parody. “The Personal History of David Copperfield” is one of the more lively, colorful and whimsical Victorian costume dramas you’re likely to see. It’s a movie flowing with fresh air, which isn’t something normally said of adaptations of 700-something-page books.

Iannucci, famed for his improvisational style and expletive-laden barrages, clearly finds in Dickens a writer simpatico in fondness for language and taste for multitudes. In many ways, they make a good match, with Iannucci’s more anarchic, free-wheeling style animating the wit and idiosyncrasies of Dickens’ tome.

And just as in the absurdly deep bench of “Veep,” casting has made a difference. Dev Patel winningly plays Copperfield, once out of childhood (as a boy, he’s played by compelling youngsters Jairaj Varsani and Ranveer Jaiswal), with wide-eyed wonder, always alive to the world around him, if generally rather mystified by it. Still, the film belongs largely to the overall cast, including Tilda Swinton, as David’s aunt Betsey Trotwood; Hugh Laurie as the mentally ill, King Charles I-obsessed Mr. Dick; Peter Capaldi as the creditor-evading Wilkins Micawber; Rosalind Eleazar as the romantic interest Agnes Wickfield; Benedict Wong as the wine-swilling Mr. Wickfield; Ben Whishaw as the plotting Uriah Heep.