Question:  Amber Gray was in what 2016 Off-Broadway musical written by Anais Mitchell?

Context paragraphs:
People Are Wrong!: People Are Wrong is a 2004 Off-Broadway musical written by Robin Goldwasser and Julia Greenberg, and stars John Flansburgh, Robin Goldwasser's husband, from the band They Might Be Giants.  It played Off-Broadway at the Vineyard Theatre from October 22, 2004 until December 11, 2004.  The production starred John Flansburgh, Erin Hill, David Driver, Robin Goldwasser, Chris Anderson and Maggie Moore.

Coffee with Conscience: Coffee With Conscience is a monthly concert series based in Westfield, New Jersey which raises money for local charities by hosting touring musical performers with a focus on singer-songwriters.  It is sponsored in part by the Westfield Service League, and it began in 2000 and has run every year since then.  Charities it sponsors include Homefirst, Habitat for Humanity, Contact We Care, the Community Food Bank of NJ and the Keith Knost Special Needs Trust.  Performances happen in downtown Westfield, New Jersey.  In the past it has supported charities such as the Eric Johnson House in Morristown, The Central Jersey Chapter of the Names Project, and others.  It features seven performances annually.  Past performers have included David Wilcox, Beaucoup Blue, Modern Man, Anais Mitchell, Red Molly, Christine Lavin, Greg Greenway, John Flynn, Reggie Harris, Don White, Pat Wictor, Toby Walker, John McCutcheon, the Guy Mendilow Band, The Bobs, Pat Wictor & Toby, Ginny Johnston, Jessica Schoenberg, Greg Greenway, David Roth, Dayna Kurtz, Bob Malone, Carla Ulbrich, Justin Roth, Cheryl Wheeler, Catie Curtis, The Kennedys, KJ Denhert, guitarist Glenn Alexander and many others.  It was founded by the former minister of the Springfield Emanuel Methodist Church, Jeff Markay, and has been managed by artistic director and host Ahrre Maros, and staffed by a team of volunteers.

Hadestown (musical): Hadestown is a 2016 stage musical adaptation of a 2010 folk opera concept album by the same name, written by Anaïs Mitchell.  It premiered off-Broadway at New York Theatre Workshop on May 6, 2016 and ran through July 31.  The show was developed for the stage and directed by Rachel Chavkin.

Hymns for the Exiled: Hymns for the Exiled is the second album by American folksinger Anais Mitchell, released in 2004 on Waterbug Records.  It was recorded at The Bristmill in Bristol, Vermont and produced by Michael Chorney.

Little Shop of Horrors (film): Little Shop of Horrors is a 1986 American rock musical horror comedy film directed by Frank Oz.  It is a film adaptation of the off-Broadway musical comedy of the same name by composer Alan Menken and writer Howard Ashman about a nerdy florist shop worker who finds out his venus fly trap can speak.  Menken and Ashman's Off-Broadway musical was based on the low-budget 1960 film "The Little Shop of Horrors", directed by Roger Corman.  The 1986 film stars Rick Moranis, Ellen Greene, Vincent Gardenia, Steve Martin, and Levi Stubbs as the voice of Audrey II.  The film also featured special appearances by James Belushi, John Candy, Christopher Guest, and Bill Murray.  It was produced by David Geffen through The Geffen Company and released by Warner Bros. on December 19, 1986.

This Is the New That: This Is the New That is the fourth album by American singer-songwriter Jonathan Byrd.  It was officially released March 21, 2007, although online availability began in late December 2006.  While Byrd's earlier recordings have been in more of a traditional folk vein ranging at times from bluegrass to world music, this release places Byrd's song craft in somewhat more of a rock setting.  According to Byrd, some of his diverse influences here include Bob Dylan, Anais Mitchell, The Beatles & Merle Haggard.

The Song They Sang... When Rome Fell: The Song They Sang... When Rome Fell is the 2002 debut release by Vermont-based American singer-songwriter Anais Mitchell.  The album was made during the singer's 6-month stay in Austin, Texas, and was recorded in a single afternoon.  It consists of Mitchell playing her acoustic guitar and singing with sparse production.

Jack Harris (singer-songwriter): Jack Harris (born 1986) is a Welsh-born folk singer-songwriter, musician, and poet.  He is multi-award-winning, most notably winning the 2005 New Folk Songwriting Competition at Kerrville Folk Festival in Texas, the first non-American to do so.  Jack Harris has been described as "a priest of song" by singer Anais Mitchell.

The Brightness: The Brightness is the third album by American folksinger Anais Mitchell, released February 13, 2007 on Righteous Babe Records.  It was recorded at The Bristmill in Bristol, Vermont and produced by Michael Chorney.  In December 2012, the song 'Of a Friday Night' was played as the Weather on episode 12 of Welcome to Night Vale, "The Candidate", but was mislabeled as 'The Brightness'.

Amber Gray: Amber Gray is an American actress and singer best known for portraying Hélène Kuragina in the 2016 Broadway musical "Natasha, Pierre, & the Great Comet of 1812."  Gray also played Persephone in the 2016 Off-Broadway musical "Hadestown," which received favorable reviews.

Supporting paragraphs: Amber Gray Hadestown (musical)
Answer: Hadestown