and on which channel did it air?
The CW network
Introduction
The series, created by Josh Schwartz and Stephanie Savage, ran on The CW network for six seasons from September 19, 2007, to December 17, 2012.

in gossip girl who is blair's baby daddy Prince Louis who is blair waldorf? One of the main characters of "Gossip Girl" what is gossip girl? American teen drama television series who is the director of this television series? UNANSWERABLE when did it first come out? September 19, 2007 what role does blair play in it? UNANSWERABLE are there novel series? Yes. American young adult novel series who wrote this story? Cecily von Ziegesar has he written other book series apart from the former one? The It Girl, Psycho Killer has he also written for television series? No but "Gossip Girl" was adapted for television when did that happen? 2007
The CW The CW Network. The CW
Cecily von Ziegesar Gossip Girl Cecily von Ziegesar
Television series Introduction Television series
In early 2011, The CW renewed the series for a fifth season. On May 16, 2011, Ziegesar herself made a cameo appearance in the fourth season finale. The series, created by Josh Schwartz and Stephanie Savage, ran on The CW network for six seasons from September 19, 2007, to December 17, 2012. "Gossip Girl" was adapted for television in 2007. The show premiered to mixed reviews and lost more than a million viewers from episode one to two, from 3.65 million to 2.55 million. The rest of the season's viewers went up and down, the highest being 3 million viewers for the season finale and the lowest being 1.80 million viewers for episode eleven.

Controversy and criticism surrounding the show surfaced due to the fact that it failed to show much of the books' plots, character personalities, and other major and minor facts, thus disappointing many fans of the novels. However, Ziegesar told ABC News that her major plot lines were there and that "at least it takes place in New York City".

In early 2011, The CW renewed the series for a fifth season. On May 16, 2011, Ziegesar herself made a cameo appearance in the fourth season finale
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Gossip Girl [SEP] Introduction
She is reunited with her frenemy Blair Waldorf (Leighton Meester) and her mother Lily (Kelly Rutherford), and she also meets Dan Humphrey (Penn Badgley)—an aspiring writer from Brooklyn who is one of Serena's main love interests throughout the show. Other main characters include Nate Archibald (Chace Crawford), Chuck Bass (Ed Westwick), Jenny Humphrey (Taylor Momsen), Vanessa Abrams (Jessica Szohr), Rufus Humphrey (Matthew Settle) and Ivy Dickens (Kaylee DeFer). The success of "Gossip Girl" led to many adaptations outside the United States. The show received numerous award nominations and won 18 Teen Choice Awards. The CW officially renewed "Gossip Girl" for a sixth and final season on May 11, 2012.