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?
Context: The Devil Wears Prada is a 2006 American comedy-drama film based on Lauren Weisberger's 2003 novel of the same name.  This screen adaptation stars Meryl Streep as Miranda Priestly, a powerful fashion magazine editor, and Anne Hathaway as Andrea ("Andy") Sachs, a college graduate who goes to New York City and lands a job as Priestly's co-assistant.  Emily Blunt and Stanley Tucci co-star as co-assistant Emily Charlton and art director Nigel, respectively. Lizzi Waldmüller (May 25, 1904, Knittelfeld, Styria – April 8, 1945, Vienna) was an Austrian actress and singer whose breakthrough to stardom came through her role as Rachel in the Willi Forst movie "Bel Ami" in 1939. Henry Lincoln (born Henry Soskin, 1930) is an English author, television presenter, scriptwriter and former supporting actor.  He co-wrote three "Doctor Who" multi-part serials in the 1960s, and — starting in the 1970s — inspired three Chronicle BBC Two documentaries on the alleged "mysteries" surrounding the French village of Rennes-le-Château (on which he was writer and presenter) — and later from the 1980s on co-authored and authored a series of books of which, the pseudohistorical "The Holy Blood and the Holy Grail" was the most popular, becoming the inspiration for Dan Brown's 2003 best-selling novel, "The Da Vinci Code". The Princess Diaries is a 2001 American comedy film directed by Garry Marshall and written by Gina Wendkos, based on Meg Cabot's 2000 novel of the same name.  It stars Anne Hathaway (in her film debut) as Mia Thermopolis, a teenager who discovers that she is the heir to the throne of the fictional Kingdom of Genovia, ruled by her grandmother Queen Dowager Clarisse Renaldi (Julie Andrews).  The film also stars Heather Matarazzo, Héctor Elizondo, Mandy Moore, and Robert Schwartzman. 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. 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.  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 Nada is a 2009 American made for cable erotic film directed by Jim Wynorski.  It is based on the novel "The Devil Wears Prada" by Lauren Weisberger. The Da Vinci Code is a 2006 American mystery thriller film directed by Ron Howard, written by Akiva Goldsman, and based on Dan Brown's 2003 best-selling novel of the same name.  The first in the "Robert Langdon" film series, the film stars Tom Hanks, Audrey Tautou, Sir Ian McKellen, Alfred Molina, Jürgen Prochnow, Jean Reno, and Paul Bettany.  In the film, Robert Langdon, a professor of religious iconography and symbology from Harvard University, is the prime suspect in the grisly and unusual murder of Louvre curator Jacques Saunière.  In the body, the police find a disconcerting cipher and start an investigation.  A noted British Grail historian named Sir Leigh Teabing tells them that the actual Holy Grail is explicitly encoded in Leonardo da Vinci's wall painting, "The Last Supper".  Also searching for the Grail is a secret cabal within Opus Dei, an actual prelature of the Holy See, who wishes to keep the true Grail a secret; the revelation of this secret would certainly destroy Christianity. 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. Anne Jacqueline Hathaway (born November 12, 1982) is an American actress and singer.  Her breakthrough debut film role was as Mia Thermopolis in the Disney comedy "The Princess Diaries" (2001).  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).
Answer: The Princess Diaries