See Jennifer Aniston's Dowdy Movie Makeover!

Jennifer Aniston, Jason Sudeikis, and Emma Roberts film scenes for their upcoming pot trafficking comedy "We're the Millers" in Wilmington, North Carolina on July 23, 2012. Credit:

Jennifer Aniston . . . is that you?

The usually glamorous star unveiled her dramatic makeunder on the set of her new movie, We're the Millers, in Wilmington, North Carolina July 23. Wearing a sleeveless blue button-up and khaki pants, the 43-year-old actress lugged a suitcase while filming a scene with Emma Roberts, 21.

"First day of filming on We're The Millers," Roberts tweeted. "So excited I woke up an hour early which I can assure you never happens." On July 17, Roberts tweeted that working with Aniston is a "dream come true."

We're the Millers stars Jason Sudeikis, 36, as a pot dealer who creates a fake family with Aniston and Roberts in order to smuggle 1,400 pounds of marijuana across the United States; Anison plays Sudeikis' hired "wife," who also happens to be a hooker. See more photos of Jennifer Aniston shooting We're the Millers.

Aniston and Sudeikis first shared the screen in 2010's The Bounty Hunter (costarring Gerard Butler). They teamed up again in 2011 for the ensemble comedy Horrible Bosses, also starring Jason Bateman, Charlie Day, Colin Farrell, Kevin Spacey and Jamie Foxx.