Question: The Adventures of Elmo in Grouchland was a 1999 film which involved the use of puppets from a puppeteer who was also the voice of what character from "Star Wars"?

Context articles: Puppet
Puppetry
Star Wars: Maul: Lockdown
Star Wars comics
Starkiller
Marcus Clarke (puppeteer)
Star Wars: Thrawn
Frank Oz
Sesame Street Presents Follow That Bird
The Adventures of Elmo in Grouchland

A puppet is an object, often resembling a human, animal or mythical figure, that is animated or manipulated by a person called a puppeteer.
 The puppeteer uses movements of their hands, arms, or control devices such as rods or strings to move the body, head, limbs, and in some cases the mouth and eyes of the puppet.
 The puppeteer often speaks in the voice of the character of the puppet, and then synchronizes the movements of the puppet's mouth with this spoken part.
 The actions, gestures and spoken parts acted out by the puppeteer with the puppet are typically used in storytelling.
 Puppetry is a very ancient form of theatre which dates back to the 5th century BC in Ancient Greece.
 There are many different varieties of puppets, and they are made from a wide range of materials, depending on their form and intended use.
 They range from very simple in construction and operation to very complex.
Puppetry is a form of theatre or performance that involves the manipulation of puppets—inanimate objects, often resembling some type of human or animal figure, that are animated or manipulated by a human called a puppeteer.
 Such a performance is also known as a puppet play .
 The puppeteer uses movements of her hands, arms, or control devices such as rods or strings to move the body, head, limbs, and in some cases the mouth and eyes of the puppet.
 The puppeteer often speaks in the voice of the character of the puppet, and then synchronizes the movements of the puppet's mouth with this spoken part.
 The actions, gestures and spoken parts acted out by the puppets are typically used in storytelling.
 There are many different varieties of puppets, and they are made of a wide range of materials, depending on their form and intended use.
 They can be extremely complex or very simple in their construction.
Star Wars: Maul: Lockdown is a "Star Wars" novel written by Joe Schreiber, released by Del Rey Books on January 28, 2014.
 Featuring Darth Maul and set before the events the 1999 film "", it was the last novel to be released in the "Star Wars Legends" line of the "Star Wars" franchise.
"Star Wars" comics have been produced by various comic book publishers since the debut of the 1977 film "Star Wars".
 An eponymous series by Marvel Comics began in 1977 with a six-issue comic adaptation of the film and ran for 107 issues, until 1986.
 Blackthorne Publishing released a three-issue run of 3-D comics from 1987 to 1988.
 Dark Horse published the limited series "" in 1991, and ultimately produced over 100 "Star Wars" titles until 2014, including manga adaptations of the original trilogy of films and the 1999 prequel "".
 The Walt Disney Company acquired Marvel in 2009 and Lucasfilm and in 2012, and the "Star Wars" comics license returned to Marvel in 2015.
 In 2017, IDW Publishing launched the anthology series "Star Wars Adventures".
Starkiller, born Galen Marek and also known as The Apprentice, is the Dark Jedi anti-hero protagonist of the "" project.
 In 2014, Lucasfilm rebranded him as part of the "Star Wars Legends" non-canonical story-line, and the character has not been re-introduced yet into the "Star Wars" canon.
 He is raised by Darth Vader and is made his secret apprentice under the name "Starkiller" due to being potent with using the Force for destructive purposes and described as less of an assassin and more of a "Force wrecking ball".
 The character's name is taken from Luke Skywalker's original name, "Annikin Starkiller".
 The character's likeness and voice are provided by Samuel Witwer.
 Despite "The Force Unleashed" being of non-canonical "Legends" status, Witwer still remains part of the "Star Wars" canon by voicing Darth Maul in the animated series "Star Wars: The Clone Wars" and "Star Wars Rebels".
Marcus Clarke is a puppeteer and voice actor from Nottinghamshire.
 He is best known as the puppeteer and voice actor behind the BAFTA-winning ITV Kids series Bookaboo and the principal puppeteer of Audrey II in the 1986 version of Little Shop of Horrors.
 Clarke has worked as a puppeteer in over 60 television series and has created a similar number of puppets.
 He was also a puppeteer and voice actor in two Muppet feature films and Who Framed Roger Rabbit.
Star Wars: Thrawn (also known simply as Thrawn) is a "Star Wars" novel by Timothy Zahn, published on April 11, 2017 by Del Rey Books.
 It chronicles the origins of Grand Admiral Thrawn, a popular character originating from the "Star Wars Legends" line of works, which were declared non-canon to the franchise after Lucasfilm redefined "Star Wars" continuity in April 2014.
 The novel was announced in July 2016 alongside news that the character Thrawn would be reintroduced into the "Star Wars" franchise on the 3D CGI animated television series "Star Wars Rebels".
Frank Oz (born Frank Richard Oznowicz; born May 25, 1944) is an English-born American puppeteer, filmmaker and actor.
 His career began as a puppeteer, where he performed the Muppet characters of Miss Piggy, Fozzie Bear, Animal, and Sam Eagle in "The Muppet Show", and Cookie Monster, Bert, and Grover in "Sesame Street".
 He is also known for being the puppeteer and voice of Yoda in the "Star Wars" films.
Sesame Street Presents: Follow That Bird (commonly shortened to Follow That Bird) is a 1985 American musical road-comedy film, directed by Ken Kwapis, starring many "Sesame Street" characters (both puppets and live actors).
 This was the first of two "Sesame Street" feature films, followed in 1999 by "The Adventures of Elmo in Grouchland".
 The film was produced by Sesame Workshop and Warner Bros., and filmed at the Toronto International Studios, and on location in the Greater Toronto Area.
The Adventures of Elmo in Grouchland is a 1999 American-German musical fantasy-comedy film directed by Gary Halvorson.
 It is the second theatrical feature-length film based on the popular U.S. children's series "Sesame Street", the first being "Sesame Street Presents Follow That Bird" in 1985.
 Produced by Jim Henson Pictures in association with Sesame Workshop and released by Columbia Pictures on October 1, 1999, the film co-stars Mandy Patinkin and Vanessa Williams.
 The film was shot in Wilmington, North Carolina, at EUE/Screen Gems in 1998.
 This is one of the few "Sesame Street" productions directly produced by Jim Henson Pictures.
 Alongside "Muppets from Space", this the final Muppet-themed feature film to have the involvement of Frank Oz, who retired from being a full-time puppeteer the following year.