Question: Mary Poppins Returns, is an upcoming American musical fantasy film directed by Rob Marshall, the film stars which British-American film and stage actress, and made her professional debut in a 2001 London production of the play "The Royal Family"?
Context: Mischa Anne Barton (born 24 January 1986) is a British-American film, television, and stage actress, and occasional fashion model.  She began her acting career on the stage, appearing in Tony Kushner's "Slavs! " and took the lead in James Lapine's "Twelve Dreams" at New York City's Lincoln Center.  She made her screen debut with a guest appearance on the American soap opera "All My Children" (1996).  She then voiced a character on the Nickelodeon cartoon series "KaBlam! " (1996–97).  Her first major film role was as the protagonist of "Lawn Dogs" (1997), an acclaimed drama co-starring Sam Rockwell.  She continued acting, appearing in major box office pictures such as the romantic comedy, "Notting Hill" (1999) and M. Night Shyamalan's psychological thriller, "The Sixth Sense" (1999).  She also starred in the critically acclaimed indie crime drama "Pups" (1999). Chicago is a 2002 American musical crime comedy-drama film based on the stage-musical of the same name, exploring the themes of celebrity, scandal, and corruption in Chicago during the Jazz Age.  The film stars Catherine Zeta-Jones, Renée Zellweger and Richard Gere.  "Chicago" centers on Velma Kelly (Zeta-Jones) and Roxie Hart (Zellweger), two murderesses who find themselves in jail together awaiting trial in 1920s Chicago.  Velma, a vaudevillian, and Roxie, a housewife, fight for the fame that will keep them from the gallows.  Directed and choreographed by Rob Marshall, and adapted by screenwriter Bill Condon, with music by John Kander and lyrics by Fred Ebb, "Chicago" won six Academy Awards in 2003, including Best Picture.  The film was critically lauded, and was the first musical to win Best Picture since "Oliver! " in 1968. Mary Poppins is a 1964 American musical-fantasy film directed by Robert Stevenson and produced by Walt Disney, with songs written and composed by the Sherman Brothers.  The screenplay is by Bill Walsh and Don DaGradi, loosely based on P. L. Travers' book series "Mary Poppins".  The film, which combines live-action and animation, stars Julie Andrews in the role of Mary Poppins who visits a dysfunctional family in London and employs her unique brand of lifestyle to improve the family's dynamic.  Dick Van Dyke, David Tomlinson, and Glynis Johns are featured in supporting roles.  The film was shot entirely at the Walt Disney Studios in Burbank, California using painted London background scenes. Lin-Manuel Miranda ( ; born January 16, 1980) is an American composer, lyricist, playwright, and actor best known for creating and starring in the Broadway musicals "Hamilton" and "In the Heights".  He co-wrote the songs for Disney's "Moana" soundtrack (2016) and is set to star in their upcoming film "Mary Poppins Returns".  Miranda's awards include a Pulitzer Prize, two Grammy Awards, an Emmy Award, a MacArthur Fellowship, and three Tony Awards. The Sword in the Stone is a 1963 American animated musical fantasy comedy film produced by Walt Disney and released by Buena Vista Distribution.  The 18th Disney animated feature film, it was the final Disney animated film to be released before Walt Disney's death.  The songs in the film were written and composed by the Sherman Brothers, who later wrote music for other Disney films like "Mary Poppins" (1964), "The Jungle Book" (1967), "The Aristocats" (1970), and "Bedknobs and Broomsticks" (1971). Emily Olivia Leah Blunt (born 23 February 1983) is a British-American film and stage actress.  Blunt made her professional debut in a 2001 London production of the play "The Royal Family".  Two years later, she appeared on screen for the first time in the 2003 television film "Boudica (Warrior Queen)" and portrayed ill-fated queen consort Catherine Howard in the miniseries "Henry VIII".  Her performance in the 2004 drama film "My Summer of Love" garnered her the Evening Standard British Film Award for Most Promising Newcomer.  For her performance in the TV film "Gideon's Daughter" (2006) she received a Golden Globe Award for Best Supporting Actress.  The same year, she received a Golden Globe nomination for Best Supporting Actress – Motion Picture and a nomination for a BAFTA Award for Best Actress in a Supporting Role for "The Devil Wears Prada." Karen Dotrice ( ; born 9 November 1955) is a British actress, known primarily for her role as Jane Banks in Walt Disney's feature film adaptation of the "Mary Poppins" book series.  Dotrice was born in Guernsey to two accomplished stage actors.  Her career began on stage, and expanded into film and television, including starring roles as a young girl whose beloved cat magically reappears in Disney's "The Three Lives of Thomasina" and with "Thomasina" co-star Matthew Garber as one of two children pining for their parents' attentions in "Poppins".  She appeared in five television programmes between 1972 and 1978, when she made her only feature film as an adult.  Her life as an actress concluded with a short run as Desdemona in the 1981 pre-Broadway production of "Othello". Lisa O'Hare began her career as an English stage actress who has played Eliza Doolittle in "My Fair Lady" and the title character of "Mary Poppins" on the West End and UK stage.  She more recently has appeared in several prime-time American television shows on TNT, ABC and NBC.  She most recently starred on Broadway in the new musical, "A Gentleman's Guide to Love and Murder". Mary Poppins Returns (also known as Mary Poppins 2) is an upcoming American musical fantasy film directed by Rob Marshall and written by David Magee.  It is the sequel to the 1964 film "Mary Poppins".  The film stars Emily Blunt, Lin-Manuel Miranda, Ben Whishaw, Emily Mortimer, Pixie Davies, Joel Dawson, Nathanael Saleh, Julie Walters, Colin Firth, Dick Van Dyke and Meryl Streep.  Set 25 years after the 1964 film, it will feature Mary Poppins, the former nanny of Jane and Michael Banks, re-visiting them after a family tragedy.  The film is scheduled for release on December 25, 2018, giving it one of the longest gaps between film sequels in history. Into the Woods is a 2014 American musical fantasy film directed by Rob Marshall, and adapted to the screen by James Lapine from his and Stephen Sondheim's Broadway musical of the same name.  A Walt Disney Pictures production, it features an ensemble cast that includes Meryl Streep, Emily Blunt, James Corden, Anna Kendrick, Chris Pine, Tracey Ullman, Christine Baranski, Lilla Crawford, Daniel Huttlestone, MacKenzie Mauzy, Billy Magnussen, and Johnny Depp.  Inspired by the Grimm Brothers' fairy tales of "Little Red Riding Hood", "Cinderella", "Jack and the Beanstalk", and "Rapunzel", the film is a fantasy genre centered on a childless couple, who set out to end a curse placed on them by a vengeful witch.  Ultimately, the characters are forced to rectify the consequences of their actions.
Answer: Emily Blunt