Dziena had a small role in the movie Broken Flowers (2005), starring Bill Murray, in which she played Lolita, the daughter of a character played by Sharon Stone. She played Heather, a sexually-frustrated young woman who takes part in a couple-swap to save her relationship as part of an experimental therapy in the film Sex and Breakfast (2007). She also co-starred in the films Fool's Gold (2008) and Nick and Norah's Infinite Playlist (2008).
In 2022, Without Ward was released; Dziena shot her scenes for the film in 2012.[2]
In September 2011, Dziena attempted to get a restraining order against her parents, claiming that she was living in fear of them resorting to "murder or violence" to access her money. Her request was declined by a judge later that month as she had insufficient evidence to support her allegations.[6]
In June 2014, Dziena's ex-boyfriend Jeffrey Francis Ausley was granted a restraining order against Dziena after she showed up at his house with a bag of clothes and announced that she was moving in. Ausley also alleged that she threatened to harm both of them if he ended their relationship.[7]
