Question: What is the name of the actress known for her role as Grace on "How to Rock" and the movie Before I Fall?
Context: Geraldine Margaret Agnew-Somerville (born 19 May 1967) is an Irish born actress known for her role as Detective Sergeant Jane Penhaligon in "Cracker" (1993–95), for which she was nominated for the 1995 BAFTA TV Award for Best Actress, and for playing Lily Potter in the "Harry Potter" film series.  Her other film appearances include "Gosford Park" (2001), "My Week with Marilyn" (2011) and "Grace of Monaco" (2014). Fall From Grace is an American alternative rock band formed in 2004 in Seattle, Washington.  The band is best known for winning Fuse TV's reality show "Bodog Music Battle of the Bands" and winning a one million dollar recording contract with Bodog Music.  Fall From Grace beat out over 7000 bands; ten of which they toured with for the prize.  Those bands included new Bodog artists Boston's Fear Nuttin' Band, Miami's Big Bang Radio, Dallas's Ashmore, Houston's Subversa, Atlanta's The Mood, Minneapolis's Leroy Smokes, Los Angeles's Blaxmyth, Phoenix's Idle Red, San Francisco's Strifer, and Philadelphia's Burn Down All Stars.  The band released their first major label album, "Sifting Through the Wreckage", in 2008, and toured with Alesana to support the album.  The album includes the singles "Pictures On The Wall" and "Last Straw". Kathryn Drysdale (born December 1981) is an English actress known for her role as Grace Shelley in The West End show "The Ruling Class" opposite James Mcavoy, as Taylor in the movie "St Trinian's", Rhoda Swartz in Mira Nair's Vanity Fair, and Louise Brooks in the BBC comedy series "Two Pints of Lager and a Packet of Crisps" from 2001 until her departure from the show in 2009.  She has also starred in the fourth series of the ITV sitcom "Benidorm" and as Brownwell in William Boyd's award-winning "Any Human Heart" opposite Jim Broadbent.  She previously worked with Broadbent on Mira Nair's feature adaptation of William Thackery's "Vanity Fair" starring Reese Witherspoon.  She played the role of mixed-race heiress Rhoda Swartz.  She is also known for her role as Lizzie in the drama series "Tripping Over" by Mike Bullen.  She appeared in "Doctor Who" as Bliss in the episode "Love & Monsters".  She currently plays Meghan Markle in season 2 of "The Windsors". Thea Louise Señerez Tolentino (born 13, August 1996 in Calamba, Laguna, Philippines), better known for her screen name.  Thea Tolentino, is a Filipina actress known for her role as Ashley Mercado Alcantara in the GMA Network television drama "The Half Sisters", Tolentino started her career as one of the winners of the of the reality show, "Protégé", a reality based "artista" search, created by GMA Network.  Since then, she became a contract artist of GMA and began appearing on their television dramas such as "Teen Gen", "Anna Karenina," and "", Previously years 2016, she joined the cast in "Hahamakin ang Lahat" played the role as Phoebe-Ke, the main antagonist of the cast, In 2017, she joined the cast as the main antagonist Trish to Sinag (Mendoza) and Benjie's mistress (Richards).  Began 2017, Tolentino joined the cast in "Haplos" as Lucille, the main antagonist of the series.  She will also star in an upcoming movie entitled "This Time I'll be Sweeter" as the main antagonist that headlines Ken Chan and Barbie Forteza, her co-star in the critically acclaimed series "The Half Sisters". Nathalie Kelley (born March 3, 1985) is a Peruvian-Australian actress known for her debut role as Neela in the 2006 action film "".  Kelley later had supporting roles on television, include Dani Alvarez in ABC police procedural "Body of Proof" (2011–2012), and Grace in the first season of the Lifetime drama series "Unreal" (2015).  Kelley recently featured in the final season of the CW television series "The Vampire Diaries" in the role of Sybil.  She will also star in The CW television series "Dynasty" as Cristal Flores. Grace Jacqueline Hill (17 December 1929 – 18 February 1993) was a British actress known for her role as Barbara Wright in the BBC science-fiction television series "Doctor Who".  As the history teacher of Susan Foreman, the Doctor's granddaughter, Barbara was the first "Doctor Who" companion to appear on-screen in 1963, with Hill speaking the series' first words.  She played the role for nearly two years, leaving the series in 1965 at the same time as fellow actor William Russell (who played the companion Ian Chesterton). Halston Jean Schrage (born May 10, 1993), better known by her stage name Halston Sage, is an American actress.  She is known for her roles as Grace on the Nickelodeon television series "How to Rock", Amber on the NBC television series "Crisis", and Lacey in the film "Paper Towns". Before I Fall is a 2017 American teen drama film directed by Ry Russo-Young and written by Maria Maggenti, based on the 2010 novel of same name by Lauren Oliver.  The film stars Zoey Deutch, Halston Sage, Logan Miller, Kian Lawley, Jennifer Beals, Diego Boneta and Elena Kampouris. Maggie Grace (born Margaret Grace Denig; September 21, 1983) is an American actress, best known for her roles as Shannon Rutherford on the ABC television series "Lost" and Kim Mills in the "Taken" trilogy.  She has also appeared on "The Twilight Saga" as "Irina".  Originally from Worthington, Ohio, she went on to earn a Young Artist Award nomination in 2002 with her portrayal of 15-year-old murder victim Martha Moxley in the television movie "Murder in Greenwich".  In 2004, Grace was cast as Shannon Rutherford in the television series "Lost", on which she was a main cast member for the first two seasons, winning a Screen Actors Guild Award shared with the ensemble cast.  Leaving the series, Grace was keen to work more prominently in film, she appeared in "The Jane Austen Book Club" (both 2007), and opposite Liam Neeson as Kim Mills in "Taken" in 2008.  She reprised the role in "Taken 2" (2012) and "Taken 3" (2015). Laura San Giacomo (born November 14, 1962) is an American actress known for playing the role of Maya Gallo on the NBC sitcom "Just Shoot Me! ", Kit De Luca in the film "Pretty Woman", and Cynthia in "Sex, Lies, and Videotape" as well as other work on television and in films.  She played the role of Holly Hunter's childhood best friend on the TNT crime drama series "Saving Grace".
Answer: Halston Sage