It stars Amanda Seyfried, Finn Wittrock, Jennifer Carpenter, Michael Gaston, Amy Irving, and Paul Giamatti.

[6] The website's critics consensus reads, "A Mouthful of Air isn't as emotionally impactful as it might have been, but Amanda Seyfried's devastating performance lends the story weight.

[7] David Ehrlich of IndieWire critiqued the film's use of melodrama, but praised Seyfried's performance, writing she "sidesteps histrionics in favor of something more honest and upsetting" and "leads every scene with such an excitable degree of fear and fragility".

[8] Peter Bradshaw of The Guardian was more critical, writing the film "needed less sensitive good taste and more explicit storytelling passion.

"[9] Natalia Winkelman of The New York Times wrote "the movie’s portrait of depression often feels as facile as its opening image: Julie’s wide blue eyes with a single tear trailing down her cheek.