The\u00a0Plaza\u00a0has known many famous guests over the years, but perhaps none is as famous as Eloise, the mischievous six-year-old girl who lives at the hotel with her nanny, her dog Weenie, and her turtle Skipperdee. Created by actress and singer Kay Thompson and illustrator Hilary Knight,\u00a0Eloise\u00a0took the world by storm when it was first printed in 1955, selling 150,000 copies in two years. The success of\u00a0Eloise\u00a0prompted four sequels:\u00a0Eloise in Paris,\u00a0Eloise at Christmastime,\u00a0Eloise in Moscow\u00a0and, later,\u00a0Eloise Takes a Bawth. More than 60 years later, Eloise has become one of New York City\u2019s most beloved residents, cherished by generations of readers. Beginning June 30, the\u00a0New-York Historical Society\u00a0will pay homage to the sprightly six-year-old with the exhibition "Eloise at the Museum." It will feature original pages from Eloise manuscripts, sketches, photographs, dolls, and portraits alongside original family programming. Much of the work on view has rarely been seen, including trial Eloise drawings from Hilary Knight in 1954, previously unpublished drawings from\u00a0Eloise inParis, and a once-stolen Eloise portrait from the Plaza. The exhibition also explores the lives of both Kay Thompson and Hilary Knight and the life that Eloise took on after publication\u2014in clothes, merchandising, and even Eloise-themed children\u2019s menus from the Plaza. "I know people love ," Hilary Knight says. "It means so much. Now little girls who read it originally are now grandmas, you know? It\u2019s unbelievable." Here, a few things about Eloise\u2019s storied life that you may not know. 1. ELOISE BEGAN AS KAY THOMPSON'S IMAGINARY FRIEND GETTY IMAGES Kay Thompson had an extensive career in music long before\u00a0Eloise, and even long before\u00a0Funny Face, Fred Astaire and Audrey Hepburn movie for which she's best known and in which she plays a fashion magazine editor. At MGM Studios in the 1940s, she was a vocal coach for stars like Frank Sinatra and Lena Horne. After that, she had a hit cabaret act with musical siblings the Williams Brothers. At one point, a story made the rounds that on an occasion when Thompson was late to rehearsal, the Williams brothers got so angry with her she immediately broke into a creaky little child\u2019s voice and said \u201cI am Eloise and I am 6!\u201d to diffuse the situation. Apparently Thompson had an extremely lonely childhood and had been talking in the voice of Eloise, an imaginary friend, most of her life and often performed it for friends. Thompson was urged by friend and\u00a0Harper\u2019s Bazaar\u00a0fashion editor D.D. Ryan to turn this voice into a book. Ryan paired Thompson with her neighbor, a young illustrator named Hilary Knight, and a year later the first Eloise book was complete. 2.\u00a0ELOISE\u00a0WAS NEVER SUPPOSED TO BE A CHILDREN\u2019S BOOK SIMON & SCHUSTER The book's cover bears the caveat, "A book for precocious grown-ups, about a little girl who lives at the Plaza Hotel." After all, she was running around essentially unsupervised, ignored by mostly-absent parents, drinking champagne, and pouring water down mail chutes at one of the most luxurious hotels in America. According to illustrator Hilary Knight, "Kay said,'this is not a children\u2019s book.' It evolved, I don\u2019t know how it evolved to be the way it is, but it looks like a child\u2019s book so children think that\u2019s what it is, and they made it into one." In Lena Dunham's 2015 HBO documentary\u00a0It's Me, Hilary: The Man Who Drew Eloise, Knight mentions that because it was marketed as an adult book, the\u00a0New York Timesdidn\u2019t review it because they didn\u2019t know what to do with it. Ultimately, though, it was an instant, smashing success.\u00a0Life\u00a0magazine said Eloise was "the most controversial literary heroine of the year. She charms and terrifies like a snake." 3. HILARY KNIGHT IS AN ACCOMPLISHED ARTIST. KAY THOMPSON In the 1960s, during their work on\u00a0Eloise Takes a Bawth, Thompson pulled Knight from the project with little explanation and ceased publication of the books entirely\u2014the original four were re-released in 1999 after Thompson\u2019s death with a special Pink and Black Ball at the Plaza, and\u00a0Eloise Takes a Bawth\u00a0was finally released in 2002. Knight went on to a long and varied career as an artist. He has been a staff illustrated at\u00a0Vanity Fair, illustrated Neiman Marcus catalogs, provided artwork to more than 50 books (nine of which he wrote himself), and bejeweled fans that were used in both Richard Avedon photographs and a 1950s Revlon campaign featuring Carmen Dell\u2019Orefice. Additionally, he has created innumerable theatre and dance posters that are on view in the exhibition "Hilary Knight\u2019s Stage-Struck World" at the New York Public Library for the Performing Arts at Lincoln Center through September 1. At 90, Knight also has two graphic novels coming out in the next two years, one called\u00a0Olive & Oliver: The Formative Years, written by his nieces, and another autobiographical memoir called\u00a0Hilary Knight: Drawn From Life. "I\u2019m more active right now than I have ever been", Knight says. 4.\u00a0ELOISE\u00a0IS ACTUALLY QUITE DIFFICULT TO READ ALOUD. KAY THOMPSON "I think children are interested in because Kay was a musician, and if the right person is reading it, . It\u2019s hard to read. The dialogue has a lilt to it, and that comes from writing music," Knight says. Thompson didn\u2019t just arrange songs for MGM, she also wrote some for her own cabaret act. Over the years Knight has heard several people read it aloud, but his favorite\u2014other than Thompson\u2014was actress Dorothy Loudon, known best for originating the role of Miss Hannigan in the musical\u00a0Annie\u00a0on Broadway in 1977. 5.\u00a0ELOISE\u00a0FEATURES SOME UNUSUAL PRODUCT PLACEMENT. GETTY Kay Thompson and Hilary Knight traveled abroad to research and write\u00a0Eloise in Parisand\u00a0Eloise in Moscow. Thompson and Knight actually went to Paris twice because, as Knight is quoted in Sam Irvin\u2019s 2010 biography\u00a0Kay Thompson: From Funny Face to Eloise, "Kay didn\u2019t think we got enough material the first time in Paris." While the book\u2019s publisher, Simon & Schuster, wouldn\u2019t pay for a second trip, Thompson managed to exchange four round-trip tickets on a Belgian airline for product placement in\u00a0Eloise in Paris\u2014consequently, the airline Sabena appears on three pages in the book. After Paris, Eloise\u2019s next adventure abroad was going to be in England but Thompson, entranced by comedic possibilities of a wealthy child flouncing around a socialist republic, went for Moscow instead, where Eloise danced with the Bolshoi ballet. She and Knight spent four weeks there, feeling monitored as many visitors did at the time. This was represented in\u00a0Eloise in Moscow\u00a0by a little drawing of a man in a trenchcoat hidden on every page. 6. THERE ARE SEVERAL CELEBRITY CAMEOS IN THE ELOISE BOOKS. KAY THOMPSON They start in\u00a0Eloise in Paris. Thompson and Knight are featured dining at Maxim\u2019s, while Lena Horne and her husband at the time, Lennie Hayton, were drawn at a sidewalk cafe. Eloise\u2019s passport photographer is none other than Richard Avedon. Knight and Thompson visited Christian Dior on their trip and put the famed designer in the book with his assistant, a young Yves Saint Laurent.\u00a0Eloise at Christmastime\u00a0features Rita Hayworth. 7. HILARY KNIGHT'S INSPIRATION\u00a0ELOISE\u00a0WAS A PAINTING BY HIS MOTHER WIKIMEDIA Hilary Knight was born to a pair of artist parents, Clayton Knight and Katharine Sturges, and remembers being surrounded by artwork and the creative process at a young age. Eloise was partially inspired by a painting his mother did in the 1930s of a little girl in a black-and-white dress on a pink background. "It\u2019s just a little girl, but it\u2019s the attitude of her," Knight says. Eloise, and much of Knight\u2019s other illustrations, were also influenced by the work of Reginald Marsh, Ronald Searle, and Ernest Shepard. Shepard drew A.A. Milne\u2019s Winnie the Pooh books and you can see the influence of his illustration of Piglet running in Knight\u2019s drawings of Eloise running. 8. ELOISE ONCE DISAPPEARED FROM THE PLAZA KAY THOMPSON A watercolor portrait of Eloise, painted by Hilary Knight, hung in the Plaza\u2019s Palm Court beginning in 1957. It was stolen, however, in 1960, but the case was never solved\u2014some attribute it to drunken fraternity boys, some to naughty debutantes, and some to Kay Thompson herself for a publicity stunt. Thompson issued a reward for the portrait but it wasn\u2019t found for two years. Then, in 1962, Knight received an anonymous phone call that led him to the portrait, damaged in a dumpster. Knight produced another Eloise painting for the Plaza, an oil painting that hangs there now, and kept the original in his home for five decades. In time for the "Eloise at the Museum" exhibition, however, it's been restored by a team of art conservators and will be on view for the first time in over 55 years. 9. ELOISE WAS MEANT TO BE 6 YEARS OLD FOREVER. KAY THOMPSON "It was important to Kay that Eloise not grow up. 'We must always keep her the same, she will always live here,'" Knight says Kay would say. Many have believed that Thompson modeled Eloise after herself, an idea furthered by Knight\u2019s later drawing of Kay bumping the six-year-old to the side and writing "I AM ELOISE" on the mirror in lipstick instead. But Eloise\u2019s rebellious nature\u2014in the heart of the prim and proper 1950s\u2014is what captured audiences' hearts. "She is stuck in this period, and people don\u2019t seem to mind it. There were no cellphones. What we\u2019re used to is not there at all, and yet it survived. I\u2019m not really sure why. I think it\u2019s the spirit, her spirit, and her invention." Credits:\u00a0townandcountrymag.com Share this story on Facebook with your friends.