Question: Name the Director who has directed Mark Northover in film Willow ?
Context: Mark David Duplass (born December 7, 1976) is an American film director, film producer, actor, musician, and screenwriter.  He is the brother of director, writer, and actor Jay Duplass.  Together, the brothers started the film production company Duplass Brothers Productions, and have directed films such as "The Puffy Chair" (2005), "Jeff, Who Lives at Home" (2011), and "The Do-Deca-Pentathlon" (2012).  Mark and Jay co-created the HBO television series "Togetherness" in 2015. What's Your Number?  is a 2011 romantic comedy film directed Mark Mylod and starring Anna Faris and Chris Evans.  Written by Gabrielle Allan and Jennifer Crittenden, it is based on Karyn Bosnak's book "20 Times a Lady".  The film was released on September 30 , 2011. Mark Helfrich (born Nov. 1957) is an American film editor and director.  He is an elected member of American Cinema Editors (ACE) and serves on the board as an associate director.  Helfrich has edited over thirty films such as "Stone Cold" (1991), "Showgirls" (1995) with Mark Goldblatt.  Helfrich is also the primary editor for director Brett Ratner's films, such as "Money Talks" (1997), "Rush Hour" (1998), "The Family Man" (2000), "Rush Hour 2" (2001), "Red Dragon" (2002), and "After the Sunset" (2004), "" (2006) with Mark Goldblatt and Julia Wong.  Helfrich directed "Good Luck Chuck". Jimmy is a 2013 dramatic family film directed by Mark Freiburger.  It is based on a novel of the same name, by author Robert Whitlow.  The film adaptation was additionally written by director Mark Freiburger, and producer Gary Wheeler. Mark Northover (27 March 1950 – 6 June 2004) was a British actor with dwarfism, whose best-known screen character was Burglekutt in the 1988 film "Willow".  Another memorable role was that of Alvy in "Hardware".  Outside cinema, he made an appearance in the music video for Depeche Mode's "Walking In My Shoes". Warwick Ashley Davis (born 3 February 1970) is an English actor, television presenter, writer, director and producer.  He played the title characters in "Willow" and the "Leprechaun film series", the Ewok Wicket in "Star Wars Episode VI: Return of the Jedi" and Professor Filius Flitwick and Griphook in the "Harry Potter" films.  Davis also starred as a fictionalised version of himself in the sitcom "Life's Too Short", written and directed by Ricky Gervais and Stephen Merchant. Joseph Henry McAlpin Benrimo (1874-1942) was an American actor, playwright, and director.  He often went by the name J. Harry Benrimo.  Among his plays are "The Yellow Jacket" and "The Willow Tree"; the latter was made into a film in 1920.  He directed "The Blue Paradise" in its original Broadway production at the Casino Theatre beginning in August 1915.  He also staged the musical comedy operetta "The Well of Romance" in 1930. Mark Bamford is an American film director and screenwriter, he was born in Louisville, Kentucky, but raised mostly in New York.  He graduated from New York University (NYU) in 1989 with a double major in French Literature and Linguistics and a minor in Anthropology.  After working for several years in Los Angeles as a freelance screenwriter, Mark wrote and directed the award-winning 2000 short film "Hero", which won him the Atom Films "Director to Watch" Award in 2001.  "Hero" aired in the United States on PBS.  2004's Cape of Good Hope is his first feature. Willow is a 1988 British-American high fantasy film directed by Ron Howard, produced and with a story by George Lucas, and starring Warwick Davis, Val Kilmer, Joanne Whalley, Jean Marsh, and Billy Barty.  Davis plays the eponymous lead character and hero: a reluctant farmer who plays a critical role in protecting a special baby from a tyrannical queen who vows to destroy her and take over the world in a high fantasy setting. Elora Danan were an Australian alternative rock band from Perth, Western Australia, formed in late 2006 from various other bands in the local scene who had ended including As A Weapon and Alleged.  They took their name from a baby character in the 1988 film Willow.
Answer: Ron Howard