Question: What is the name of the British actress and children's book author, who featured in the preschool television series 'Julie's Greenroom' with Julie Andrews?
Context: Julie on Sesame Street was a variety special broadcast in the United States on ABC on November 23, 1973 at 9 PM ET / PT.  Sponsored on ABC by GTE, the special starred Julie Andrews and Perry Como, and are joined by Jim Henson's Muppets from the PBS children's series, "Sesame Street". The Julie Andrews Hour was a television variety series starring Julie Andrews that was produced by ATV and distributed by ITC Entertainment.  It aired on the ABC network in the United States. Julie Atherton is a British actress, who is best known for her work on stage.  On 3 October 2009 she finished playing the roles of Kate Monster and Lucy the Slut in the West End production of "Avenue Q".  She released her debut album, "A Girl of Few Words," on 2 October 2006.  After signing with the Speckulation record label, she released her second album titled "No Space for Air" in the Summer of 2010.  She starred as Sister Mary Robert in the first UK tour of "Sister Act: The Musical" in 2011.  In 2013 she was featured as 'French Teacher' in the world premiere of the musical 'LIFT' by Craig Adams and Ian Watson, at the Soho Theatre.  This was followed in 2014 by the title role in 'Thérèse Raquin', again by Craig Adams with Book and Lyrics by Nona Shepphard.  After a sold out run at The Finborough Theatre the production transferred to Park Theatre in Finsbury Park.  Julie wrapped up a stellar year in 2014 with the release of her third album titled 'Rush of Life', with songs written for her by Craig Adams, Dougal Irvine, Lance Horne, George Maguire and Benedict. Alicia Brandt is a television and film actress.  Her most significant roles are that of Joy Foy in the short lived 1992 sitcom "Julie", where she starred together with Julie Andrews and James Farentino, and the main character Trudy in the 1993 independent film "Losers in Love".  Brandt's other roles include appearances on the television series "The Golden Girls", "Sister", "Maybe This Time", "Becker", "Six Feet Under", "Desperate Housewives" and "Girlfriends". Geppetto is a 2000 made-for-television musical remake of the popular children’s book "The Adventures of Pinocchio" and the original 1940 Disney film, starring Drew Carey and Julia Louis-Dreyfus debuting on The Wonderful World of Disney.  It featured original songs written by Stephen Schwartz.  Schwartz had developed the songs as a reunion for "Mary Poppins" stars Julie Andrews and Dick Van Dyke, but Andrews was undergoing throat surgery so the idea was dropped. Emma Walton-Hamilton (born Emma Katherine Walton; 27 November 1962) is a British actress, theatrical director and author of children's books.  She is currently an instructor in the MFA program at SUNY-Stony Brook Southampton. The Last of the Really Great Whangdoodles is a children's novel written by Julie Edwards, the married name of singer and actress Dame Julie Andrews.  More recent editions credit the book to "Julie Andrews Edwards". Peter Rabbit (TV Series; 2012-2016) is a British/American CGI animated children's preschool television series that debuted on Nick Jr. on December 14, 2012 in the United States and on the CBeebies channel and BBC One on December 25, 2012 in the United Kingdom.  It is based on the character of the same name from the Beatrix Potter children's books.  The series debuted in 2012 with a holiday special, "Peter Rabbit's Christmas Tale", which was watched by three million viewers in the U.S.  The first official DVD of "Peter Rabbit" came out on May 28, 2013, as a Walmart exclusive.  it contains the show's first eight episodes on a single disc.  On October 11, 2013, Nickelodeon ordered a second season of 26 episodes.  The series is also dubbed in Welsh on the S4C channel as "Guto Gwningen".  The show ran for two seasons from 2012-2016 and was produced for Nickelodeon in the US by Brown Bag Films and Silvergate Media.  The show also aired on CBeebies in the UK.  There are currently no plans for a third season, and the show has not been worked on since its second season conclusion, with the final episode being released on May 6, 2016. Judith Anita Rothman Rofé (aka Judy Rothman Rofé) is an American screenwriter, producer, lyricist and author specializing in comedy and literary adaptations for children.  She won the 2002 Emmy for Best Animated Program for "The New Adventures of Madeline" (based on the books by Ludwig Bemelmans), for which she was writer, lyricist, story editor and supervising producer on over 70 episodes.  She was nominated for three additional Emmys, and also won an Ace award and the Humanitas Prize.  In 2016 Rothman created the preschool television series "Julie's Greenroom" with Julie Andrews and Emma Walton Hamilton.  The show stars Julie Andrews, who is joined by her assistant Gus (Giullian Yao Gioiello) and the “Greenies,” a cast of original puppets built by The Jim Henson Company and will premiere on Netflix on March 17, 2017. Giullian Yao Gioiello (born September 24, 1992) is an American actor and musician.  He is known for playing Gus, Julie Andrews' right-hand man in the children's series Julie's Greenroom on Netflix, which premiered on March 17, 2017.  In 2016, he played the role of Kip in Catfight (film).  In 2014, he appeared in a recurring role as Scott in The Carrie Diaries (season 2).
Answer: Emma Walton Hamilton