Question: What individual plays the part of Georgina Sparks?
About the article "Gossip Girl", section "Casting".

Candidate passages:
  Georgina Jones, the main supporting character in Adam Adamant Lives!
Georgina Kirrin, "George" in Enid Blyton's "Famous Five" series  Georgina Sparks, a character from the "Gossip Girl" book and television series  Georgina Orwell, a character from Lemony Snicket's "A Series of Unfortunate Events" book series  Grandma Georgina, a supporting character in Roald Dahl's book "Charlie and the Chocolate Factory"  
Georgina returns to the Upper East Side with her husband, Phil, for the royal wedding of Blair and Louis in order to ruin Blair's happy ending as revenge for the many things Blair has done to her.
She is caught inside the church by Rufus and Lily who have her thrown out, but not before she ends up recording Blair's confession of love to Chuck before the wedding commences.
Georgina leaves the video in Chuck's hands.
After 'Gossip Girl' plays the video, Georgina is confronted by Dan, Nate and Serena, but Georgina denies any involvement and accuses each of them of sending the video, before promptly leaving.
Georgina is seen to be posting a blast on the Gossip Girl website.
After Blair's wedding, Georgina locks Dorota in Blair's closet in an attempt to find Blair and destroy what she thinks is Blair's "happily ever after".
When Chuck and Serena free Dorota, she follows them to the hotel in which Dan and Blair are hiding out and takes a photo while framing Serena for sending the video to Gossip Girl.
After taking her camera back from Serena, Georgina is seen putting up a video of Blair and Louis leaving for their honeymoon.
Georgina reveals to her Phil, her husband/accomplice, that the real 'Gossip Girl' abandoned her post following Chuck and Blair's accident.
Phil appears to love Georgina and knows all about her past and of her agenda against everyone she knows on the Upper East Side and he assists her in times of need despite the fact that she often treats him badly and ignores their baby, Milo, leaving Phil as the parental caregiver at home while she goes out to work her ways.
Following Blair's return from her honeymoon, Georgina learns that Ivy is back in town and goes to the Van der Woodsen's to confront her.
While at a party thrown by Nate, Dan discovers that she is Gossip Girl and he blackmails her with this information as she is trying to get Blair to default on her marriage to Louis, thereby effectively ruining her family's financial security.
Georgina and Serena witness a kiss between Dan and Blair that Georgina manages to get a photo of.
Georgina appears briefly in the season finale.
Dan, having seemingly been dumped by Blair, alienated and betrayed by Serena, Lily, Chuck, Nate and everyone that he knows, approaches Georgina, asking for help to publish the sequel to "Inside", pledging to write the novel "he should have written from the beginning".
Georgina, with her own personal score to settle with all of the characters of the Upper East side, is happy to help. 
  Georgina Ice, a Junior Hockey team in Georgina, Ontario  Georgina Cole Library, in Carlsbad, California  Georgina Public Libraries, the public library system of Georgina, Ontario  
Sparks Middle School is a school in Sparks, Nevada and part of the Washoe County School District. 
Georgina Sparks, a girl from Serena van der Woodsen's past who used to party with her, returns to New York from Switzerland.
Georgina is first mentioned in "The Blair Bitch Project" when Serena discovers that it was she (and not Chuck as previously suspected) who was the one who had been sending her packages of champagne, porn, sex toys and drugs.
Serena apologises to Chuck and shows him Georgina's letter.
However, he later reassures her that Georgina is still in Switzerland.
Despite Chuck’s assurance, Georgina steals her father's jet and arrives in Manhattan in "Desperately Seeking Serena" and surprises Serena with a visit to Constance.
Serena's plans to study with Dan Humphrey for the SATs are cut short when Georgina persuades her to go out and have drinks to catch up with each other.
Serena reluctantly agrees, but after a few cocktails, Serena's wild-child persona returns.
Serena reverts to her good girl persona however when she answers a call meant for Georgina that reveals she is still in contact with drug dealers and leaves, realizing that Georgina hasn't changed and that she missed her study date with Dan, which she and Chuck cover up with food poisoning.
Serena apologises for the missed study plans and says she will meet Dan and Blair at the SATs the next day.
Georgina calls her again, asking her to go to dinner with her.
Serena declines the offer at first but Georgina assures that there won't be any wild partying and tells her how she has been inspired to turn her life around after seeing Serena the other day.
Impressed, Serena meets Georgina for dinner, who compliments her on how much she's changed.
When Serena gets up from the table to call Dan, Georgina drugs Serena's Diet Coke.
Serena wakes up frantic the next morning in Georgina's apartment, and ends up missing her SATs.
Georgina packs her bags to leave Manhattan until Serena confronts her, seeking to end their friendship, having realized that she makes too many mistakes when she's around her.
Georgina recounts an incident which Serena quickly dismisses before its revealed.
Unfortunately for Serena, Georgina changes her mind, unpacks her bags and ends up meeting Dan in Central Park, introducing herself as Sarah.
Under the guise of Sarah, Georgina becomes friends with Dan and Vanessa determined to impose her presence in Serena’s life.
Georgina sends Serena a video of what appears to be Serena in a sex tape and then invites herself in to the van der Woodsen’s home subsequently outing Eric during dinner.
Distressed, Serena runs to Dan, he introduces her to Sarah who Serena is shocked to discover is Georgina in disguise.
Georgina then proceeds to blackmail Serena with the video threatening to reveal all the dark secrets from her past.
Serena has a breakdown and eventually confesses to Blair, Nate and Chuck.
It is revealed that after Serena had sex with Nate at a wedding, Serena went to join Georgina and a boy named Pete Fairman at a hotel, who hid a video camera in the room to tape him and Serena having sex.
Serena wasn't in the mood, though, and instead passed Pete a line of cocaine which he subsequently overdosed on.
Panicked Serena called the emergency services and she and Georgina fled the hotel.
After learning that Pete had died Serena ran away to boarding school.
It is learned that Chuck lost his virginity to Georgina in the 6th grade and he remembers her partying attitude before Serena went to boarding school.
Serena tells them that Georgina is blackmailing her into continuing the lifestyle they used to have.
At Rufus’s concert, Dan and Vanessa learn that Sarah is in fact Georgina.
Vanessa is told the truth by Nate but Georgina successfully deceives Dan by concocting a story about an abusive ex-boyfriend.
In light of Dan and Serena’s break-up over her constant lies to cover-up her secrets, Georgina tells Dan that she is falling in love with him, she then phones Serena on Dan’s phone and tells her “all bets are off” implying she’ll be having sex with him that night.
The next morning Serena confronts Georgina at Dan’s apartment and furiously tries to attack her.
After Georgina leaves Serena eventually tells Dan the truth which he believes and with the help of Blair, Dan devises a plan to get rid of Georgina.
Dan calls Georgina up and has her meet him in Central Park; he consequently leaves her after she confesses her feelings for him and is met by Blair who has tracked down Georgina's parents.
Blair reveals that Georgina was supposed to be at an equestrian circuit but sold her show pony for cocaine.
Georgina was in fact in a rehabilitation center in Utah where she escaped, hitchhiked into a town, stole a credit card and booked a ticket to Ibiza.
Georgina is left with her parents who decide her fate by sending her to a boot camp for troubled young girls, upon Blair's suggestion.