Woman in GoldGustav Klimt's "The Lady in Gold" may be considered "the Mona Lisa of Austria," but for one woman, it's a beloved reminder of her aunt.

That's the story behind "The Woman in Gold," which has a brand-new trailer. Helen Mirren stars as Maria Altmann, a former Jewish socialite who fled the Nazis during World War II. She left behind her home and her belongings - including a portrait of her aunt by the artist Gustav Klimt.

Now, that painting is famous worldwide (and as a poster, adorns countless college dorm rooms), and Maria wants it back. She enlists a lawyer (Ryan Reynolds) to help her fight the Austrian government to restore the portrait to its rightful owner. Not only does Maria want a memento of her favorite aunt, she wants justice for the atrocities committed by the Nazis.

"Woman in Gold" also stars Daniel Bruhl, Katie Holmes, Charles Dance, and Elizabeth McGovern, and opens in theaters April 3.