“Live your life with arms wide open/Today is where your book begins/The rest is still unwritten.”

Buoyant lyrics from Natasha Bedingfield’s song “Unwritten” announce MTV’s hit series “The Hills,” setting the tone for this world of hope, privilege and opportunity. And, appropriately, thus begins the Upright Citizens Brigade’s hilarious rendition of season three, episode one of “The Hills.”

First, the narrator, Tom Kenny, gets the entire cast to act out the first two seasons in a sort of speed summary that lasts less than 10 minutes – crucial for non-“The Hills”-types. Then, the cast acts out an episode word for word – some providing a bit of twist with intonation and irony, others, like Robin Shorr as Whitney Port, doing dead-on impressions of the “characters.”

A game cast, including Janeane Garofalo and Andy Richter, stutter, toss their hair and stumble through their dialogue with the reverence of Shakespearean actors. The packed audience could not stop laughing at this portrait of Americana that continues to endure, both delighting and horrifying its fans.

The cipher that is Lauren Conrad, with her Marcia Brady looks and almost childish innocence, manages to stand out even starker in the Upright Citizens Brigade Theatre, but, as with the actual show, and a train wreck, it is nearly impossible to look away. Even more jaw-dropping, at least in the capable hands of Rob Huebel (Spencer Pratt), Rachael Harris (Heidi Montag) and Dannah Feinglass (Audrina Patridge), is how these characters transform into comic geniuses.

There is definite comedy gold worth mining in them thar “Hills.”