Question: What nationality is the actress that portrayed Juliet Sharp in "Gossip Girl"?

Context paragraphs:
Vanessa Abrams: Vanessa Abrams is a fictional character in the "Gossip Girl (novel series)".  She is portrayed by Jessica Szohr in Gossip Girl.  Vanessa was introduced on the first season as a recurring character, but became series regular after a successful run due to the popularity of their character, but left the series at the end of the fourth season.

List of Gossip Girl: Acapulco episodes: "" is a Mexican television series which premiered on August 5, 2013 in Mexico on Golden Premier and ended on September 6, 2013 after 25 episodes.  "Gossip Girl: Acapulco" is the Mexican adaptation of "Gossip Girl", and is produced by El Mall and Warner Brothers International Television.  Pedro Torres serves as executive producer.  The first season summarises original "Gossip Girl" seasons 1 and 2, as the producer wanted to have a more dramatic and intense storyline.

Gossip Girl: Thailand: Gossip Girl: Thailand (Thai: กอสซิป เกิร์ล ไทยแลนด์ ) is a Thai teen drama television series produced by Kantana Group and InTouch, based on the American television series "Gossip Girl".  The first and only season aired on Channel 3 from July 16 to November 19, 2015, for 18 episodes.

Juliet Sharp: Juliet Sharp is a recurring character who exclusively appeared in the "Gossip Girl" television adaptation.  The character was created by "Gossip Girl" producer Stephanie Savage and is portrayed by actress Katie Cassidy.  The series portrays her as a scheming and secretive but caring woman who develops into a formidable antagonist as her agenda against Serena van der Woodsen progressed.  The actions of character has drawn comparisons to another villain of "Gossip Girl", Georgina Sparks, and received positive reviews for her inclusion in the series.  Juliet only appears during the first half of the fourth season, though she returns in the series finale.

List of Gossip Girl episodes: "Gossip Girl" is a teen drama which premiered on September 19, 2007 in the United States on The CW.  "Gossip Girl" is based on the young-adult book series of the same name written by Cecily von Ziegesar, and was developed for television by "The O.C." creators Josh Schwartz and Stephanie Savage.  The series follows the lives of the young, wealthy, and social elite residing in the Upper East Side of Manhattan, and is narrated by an unseen and seemingly omniscient character, "Gossip Girl", whose blog is widely read among the characters.

Gossip Girl (season 1): The first season of "Gossip Girl", an American teen drama based upon the book series by Cecily von Ziegesar.  Developed for television by Josh Schwartz and Stephanie Savage.  Airing on The CW from September 19, 2007 till May 19, 2008 with 18 episodes.  It tells the story of Serena van der Woodsen's return to Manhattan's Upper East Side in New York City following her mysterious disappearance to boarding school in Connecticut, while being watched by gossip website Gossip Girl.

Jenny Humphrey: Jennifer Tallulah "Jenny" Humphrey is one of the characters in both the "Gossip Girl" and "The It Girl" series of novels by Cecily von Ziegesar.  She is portrayed by Taylor Momsen in the "Gossip Girl" television adaptation on The CW.

Katie Cassidy: Katherine Evelyn Anita Cassidy (born November 25, 1986) is an American actress.  After initially appearing in minor television roles, she made her film debut in "When a Stranger Calls" (2006).  During the same year, she also had her first starring role as Kelli Presley in "Black Christmas" (2006).  In 2007, Cassidy gained attention for her role as Ruby on the supernatural-horror television series "Supernatural", during its third season.  She later had a supporting role in "Taken".  In 2009, Cassidy became a cast member of the series "Harper's Island" and "Melrose Place", both of which lasted for only one season.  During 2010, she had a supporting role as Kris Fowles in "A Nightmare on Elm Street" and a recurring role during the fourth season of "Gossip Girl".

Serena van der Woodsen: Serena Celia van der Woodsen is a main character in the "Gossip Girl" novel series and its TV adaptation, in which she is portrayed by Blake Lively.  Serena is featured on the blog of the series' mysterious narrator, "Gossip Girl."  Serena is Blair Waldorf's best friend and is a character that appears to easily get whatever she wants, because of her good looks, energy and charisma.  She is also known as the "It Girl" in the series.

Blair Waldorf: Blair Cornelia Waldorf is the lead character of "Gossip Girl", introduced in the original series of novels and also appearing in the television and manga adaptations.  Described as "a girl of extremes" by creator Cecily von Ziegesar, she is a comical overachiever who possesses both snobbish and sensitive sides.  Due to her position as queen bee of Manhattan's social scene, Blair's actions and relations are under constant scrutiny from the mysterious Gossip Girl, a popular blogger.

Supporting paragraphs: Juliet Sharp Katie Cassidy
Answer: American