

In early 2006, Zimmer was cast as Brianna, the competitive law undergrad, in the ABC crime/drama series In Justice.

It was accepted into the Tribeca Film Festival. Also in 2005, she acted in the short film Just Pray, directed by Tiffani Thiessen. After the series was canceled, she spent the second season recurring as Sister Lilly Waters in the CBS drama, Joan of Arcadia, as well as guest-starring in episodes of NYPD Blue and Jake in Progress. Zimmer eventually booked her first TV series regular role on the NBC comedy Good Morning, Miami as the lazy and burned-out office assistant, Penny Barrington.

During that same period, she was cast in a few independent movies such as Spin Cycle, Home Room, and Warm Blooded Killers. After starring in several national commercials, most notably for Duracell, she started making guest appearances in such shows as Ellen, Seinfeld, The X-Files, Gideon's Crossing, and The King of Queens, as well as having recurring roles in The Wayans Bros., Hyperion Bay, and The Trouble With Normal. Zimmer's stage career was highlighted with her award-winning portrayal in a Los Angeles production of Catholic School Girls, where she won a Dramalogue for Best Actress. Following high school, she was accepted to the American Academy of Dramatic Arts in Pasadena. Zimmer decided to pursue a career in acting after she fell in love with the craft as a high school student. She speaks fluent German, saying in a 2015 interview that although her parents spoke English with her as a child, she spent six weeks of every summer in Germany, with her grandmother who only spoke German. Zimmer was born in Seattle, Washington, to German migrant parents from the former East Prussia.
