Mistress America steamrolls through its mesmerizingly dense running time with such joyous violence that its themes only bubble up to the surface in retrospect, the heart of the movie identified like the dental records of a body that’s been burned beyond all recognition.

Baumbach has cast a wonderfully talented group of up-and-coming actors around Gerwig and Kirke, but it's the screenplay and the leads' incredible chemistry that makes it all so entertaining. There are so many one-liners that you miss because the previous line of dialogue is just as smart and laugh-inducing.

If nothing else, Mistress America confirms Gerwig as one of the great, fearless screen comediennes of her generation — a tall, loose-limbed whirligig who careers through scenes with the beatific ditziness of a Carole Lombard or Judy Holliday.

For all the energy of Gerwig and Kirke's shared chemistry and the lively dialogue that compliments it, the story of Mistress America never keeps pace, ultimately sagging into formula to the detriment of the potential displayed by its compelling protagonists.

Baumbach’s sharp examinations of the limitations of the callow arrogance of youth and the fatuous nature of egocentricity are pointed and riotously enjoyable.