Question: Difficult People co-stars the comedian and actor of what nationality?

Context paragraphs:
Immigration to Italy: As of 1 January 2017, there were 5,047,028 foreign nationals resident in Italy.  This amounted to 8.2% of the country's population and represented an increase of 92,352 over the previous year.  These figures include children born in Italy to foreign nationals (who were 75,067 in 2014; 14.9% of total births in Italy), but exclude foreign nationals who have subsequently acquired Italian nationality; this applied to 129,887 people in 2014.  Around 6,2 million people residing in Italy have an immigration background (around the 10% of the country population).  They also exclude illegal immigrants whose numbers are difficult to determine.  In May 2008, "The Boston Globe" quoted an estimate of 670,000 for this group.  The distribution of foreign born population is largely uneven in Italy: 59.5% of immigrants live in the northern part of the country (the most economically developed area), 25.4% in the central one, while only 15.1% live in the southern regions.  The children born in Italy to foreign mothers were 102.000 in 2012, 99.000 in 2013 and 97.000 in 2014.

Keaton Nigel Cooke: Keaton Nigel Cooke is an American actor.  He made his television debut in "Difficult People" (2015) and his film debut in "Wiener-Dog" (2016).

Marsha Petrie Sue: Marsha Petrie Sue (born 1946) is an author, public speaker, and motivational coach from Scottsdale, Arizona, United States.  She has produced over 27 titles of CDs, DVD,s and books including "Toxic People: Decontaminate Difficult People at Work Without Using Weapons or Work" and "The Reactor Factor: How to Deal With Difficult Situations at Work Without Going Nuclear".  Her best selling books have been translated into Russian, Romanian, Czech, French and Portuguese.  Her work has been featured in "The New York Times", "Wall Street Journal", "USA Today", "Newsweek" On-Line, "Business Journal", "The Boston Globe", "Women's Media", AllBusiness.com, "Cosmopolitan", and more.  One of her first books, "The CEO of YOU: Leading Yourself to Success" was named the Arizona Book Publishers Association Non-Fiction Best Book of the Year.

Abby Elliott: Abby Elliott (born June 16, 1987) is an American actress and comedian best known for her four seasons as a cast member on "Saturday Night Live" (2008–12) and currently co-stars as Brooke on the Bravo comedy series "Odd Mom Out".  She is the daughter of actor/comedian Chris Elliott.

Difficult People: Difficult People is an American comedy series created by Julie Klausner.  Klausner stars alongside Billy Eichner as two struggling and jaded comedians living in New York City; the duo seemingly hate everyone but each other.  The series premiered on Hulu on August 5, 2015, and the second season premiered on July 12, 2016.

Chekhov's Motifs: Chekhov's Motifs (Russian: Чеховские мотивы , translit.  Chekhovskie motivy, since released in English as Chekhovian Motifs) is a 2002 Russian-Ukrainian comedy film directed by Kira Muratova.  It was entered into the 24th Moscow International Film Festival.  It is based on two works of Anton Chekhov: the short story "Difficult People" is divided to frame the one act play "Tatyana Repina".

Casper de Vries: Casper Johannes De Vries (] ; born 1 June 1964) is a South African actor, comedian, entertainer, painter, composer, director and producer.  He has gained a significant following among South Africa's Afrikaner population as well as Afrikaners living abroad.  More recently due to his work on Comedy Central Africa he has also gained popularity among English speaking South Africans.  He has both South African and Dutch nationality.  Besides Afrikaans, he is fluent in Dutch.

Michael Cavadias: Michael Cavadias is an American film actor known for Wonder Boys (film), Girls (2012 TV series) and Difficult People and theatre actor with the Mabou Mines.

Cole Escola: Cole Escola (born November 25, 1986) is an American comedian, actor, and singer, best known for his cabaret work and his appearances on the television series "Jeffery & Cole Casserole" (2009–2010) and "Difficult People" (2015–present).

Billy Eichner: Billy Eichner (born September 18, 1978) is an American comedian, actor, writer, and television personality.  He is the star, executive producer and creator of Funny Or Die's "Billy on the Street", a comedy game show that airs on truTV.  Eichner was nominated for a Daytime Emmy Award for "Outstanding Game Show Host" in 2013.  He is also known for playing Craig Middlebrooks on the sitcom "Parks and Recreation".

Supporting paragraphs: Difficult People Billy Eichner
Answer: American