Robert Altman's "A Prairie Home Companion" is light, fluffy and fun, much like the radio show. As long as audiences keep this in mind, they'll be sold like Rhubarb pie and duct tape advertised during the broadcast.
The outstandingly cast ensemble and Altman's signature directing style stitch a flowing patchwork of laughs and tinges of nostalgia. Streep and Tomlin are dynamic together (and sing beautifully!), and Kline carries much of the film's comedy on his capable shoulders. The film represents a bygone era that the people of the show are still living in. Only Virginia Madsen, Lindsay Lohan and Tommy Lee Jones represent the outsiders to the otherwise coherent culture of the show, and as the film progresses, affect it and are affected by it in different ways.
I generally prefer films, however comic or fun they are, to have some deeper themes. But unlike the multi-layered theater that most of the film takes place in, there's nothing really behind the scenes here- it's art for arts sake. However, I still enjoyed the film and am actually relieved it didn't bog down in anything too serious.
Whether audiences are fans of the radio show or not, the film's worth its weight in Narco Bran Flakes.