Working on the weekends, Kristen Stewart ventured out for a lighting screen test at Leonetti Lighting Company in Pacoima, California on Saturday morning (June 13).

With co-star Dakota Fanning also showing up for the day’s duties, the pair are currently getting ready to film the new Joan Jett biopic “The Runaways”.

Set for a 2010 release, the musically charged picture sees the pair of actresses “as Jett and Cherie Currie, who formed their landmark all-girl band in the 1970s and went on to inspire bands from Blondie and Garbage to Bikini Kill and Yeah Yeah Yeahs,” reports MTV News.

Following her stay at the Leonetti Lighting Company, Miss Stewart seemed happy to be finished up – sipping on a Coca-Cola while giving a sarcastic wave to awaiting paparazzi as she hopped into her nearby car.