Question: This 2003 best-selling novel by Lauren Weisberger became the basis for a film starring an actress whose breakthrough debut film role was as Mia Thermopolis in what Disney comedy?

 It spent six months on the "New York Times" bestseller list and became the basis for the 2006 film of the same name, starring Meryl Streep, Anne Hathaway, and Emily Blunt.  The novel is considered by many to be an example of the "chick lit" genre. The Devil Wears Prada is a 2003 best-selling novel by Lauren Weisberger about a young woman who is hired as a personal assistant to a powerful fashion magazine editor, a job that becomes nightmarish as she struggles to keep up with her boss's grueling schedule and demeaning demands. <SEP>  Her breakthrough debut film role was as Mia Thermopolis in the Disney comedy "The Princess Diaries" (2001). Anne Jacqueline Hathaway (born November 12, 1982) is an American actress and singer.  Hathaway made a transition to adult roles in box office and critically acclaimed films such as "Brokeback Mountain" (2005), "The Devil Wears Prada" (2006), as Jane Austen in "Becoming Jane" (2007), "Rachel Getting Married" (2008), "Bride Wars" (2009), "Valentine's Day" (2010), as the White Queen in Tim Burton's "Alice in Wonderland" (2010), "Love & Other Drugs" (2010), as DC Comics femme fatale Catwoman in Christopher Nolan's "The Dark Knight Rises" (2012), as Fantine in Tom Hooper's "Les Misérables" (2012), "Interstellar" (2014), "The Intern" (2015), and "Alice Through the Looking Glass" (2016). <SEP> Anne Hathaway is an American actress who has appeared in film and stage.  She made her acting debut in the short lived television series "Get Real" (1999-2000).  Hathaway's breakthrough role came with the role of Mia Thermopolis in the successful Disney comedy "The Princess Diaries" (2001).  The role established her as a teen idol and she later reprised the role in its .  This was followed by a string of family-oriented films, including "Nicholas Nickleby" (2002) and "Ella Enchanted" (2004), all of which were unsuccessful.  In 2005, she voiced the lead character in the highly successful animated film "Hoodwinked! ".  The same year, she made transition to more mature roles with the acclaimed "Brokeback Mountain".  In 2006, Hathaway starred opposite Meryl Streep in the comedy-drama "The Devil Wears Prada" and portrayed Jane Austen in the biographical drama "Becoming Jane", the following year. <SEP> Isidora Simijonovic is a Serbian actress.  Simijonovic began her acting career with a lead role in the movie Klip, directed by Maja Milos, when she was 14 years old.  She portrays a sullen high school student from a Belgrade suburb.  For her performance, she won the award for the best actress at the Vilnius International Film Festival and 'The Golden Hazelnut' (Zlatni Lesnik) award for the best actress at the fifth International Festival of Film Direction in Leskovac.  After this breakthrough debut role, Simijonovic went on to star in several films such as Где је Нађа? , Атомски здесна and Haiku She also played Katarina in Dobra zena which was screened at many film festivals, including Sundance Film Festival, FEST (Belgrade) and Crossing Europe in Linz.  She made her television debut with a minor role in Andrija i Anđelka.  She starred in the pilot episode of the comedy Mamurluci but the pilot has not yet been picked up by a TV station.  She also played the part of Ivana in the play Pazi vamo.