Question: Were both Martin Adams and Sid Haig American actors?

Context articles: The Devil's Rejects
Creature (2011 film)
Martin Adams
List of Italian-American actors
Guild of Italian American Actors
Bone Tomahawk
Little Big Top
The Big Bird Cage
House of 1000 Corpses
Sid Haig

The Devil's Rejects is a 2005 American horror film written and directed by Rob Zombie, and the sequel to his 2003 film "House of 1000 Corpses".
 The film is centered on the run of three members of the psychopathic antagonist family from the previous film, now seen as antiheroic protagonists, with Sid Haig, Bill Moseley, and Zombie's wife Sheri Moon Zombie reprising their roles, with Leslie Easterbrook replacing Karen Black as the matriarch.
Creature is a 2011 American monster movie directed by Fred M. Andrews, based on a screenplay written by Andrews and Tracy Morse.
 The film is set in the Louisiana Bayou, where a group of friends discover a local legend and are in a fight for their survival.
 The film opened in theaters on September 9, 2011, in the United States and Canada.
 It stars Mehcad Brooks, Serinda Swan, Amanda Fuller, Dillon Casey, Lauren Schneider, Aaron Hill, Daniel Bernhardt, and Sid Haig.
 It made headlines for its low gross.
Martin Adams (born 4 June 1956) is an English professional darts player.
 Nicknamed Wolfie, he is a three-time BDO World Champion and three-time World Masters champion.
 He represents Cambridgeshire at county darts level and was the captain of England from 1993/94 to 2013, the longest any player has held that role.
 Adams was diagnosed with prostate cancer in April 2016.
 He had the all clear near the end of 2016.
To be included in this list, the person must have a Wikipedia article showing they are Italian American actors or must have references showing they are Italian American actors and are notable.
 As discussed in the 2005 book "Hollywood Italians" by Peter E. Bondanella, as well as numerous other sources, Italian-American actors have made a significant impact.
 The Guild of Italian American Actors was founded in 1937.
The Guild of Italian American Actors (GIAA) was founded in 1937 as the Italian Actors Union (IAU) to protect the rights of Italian American actors, and renamed in 1998.
 The guild has jurisdiction over Italian language professional theater, and works to preserve and promote awareness of Italian culture and heritage.
 GIAA also provides a casting resource to directors and producers seeking Italian American actors.
Bone Tomahawk is a 2015 American Western horror film directed, written and co-scored by S. Craig Zahler, and stars Kurt Russell, Patrick Wilson, Matthew Fox, Richard Jenkins, Lili Simmons, David Arquette, Sid Haig, and Sean Young.
 The film is produced by Jack Heller and Dallas Sonnier.
 The film had its world premiere at the Fantastic Fest on September 25, 2015 and was given a limited release on October 23, 2015, by RLJ Entertainment.
Little Big Top is 2006 American comedy film written and directed by Ward Roberts and starring Sid Haig, Richard Riehle, Hollis Resnik, Mel England, and Jacob Zachar.
 The film tells the story of an aging, unemployed clown who returns to his small hometown, content to spend the rest of his days in a drunken stupor.
 But his passion for clowning is reawakened by the local amateur circus.
The Big Bird Cage is a 1972 American exploitation film of the "women in prison" subgenre.
 It serves as a non-sequel follow-up to the 1971 film "The Big Doll House".
 The film was written and directed by Jack Hill, and stars Pam Grier, Sid Haig, Anitra Ford, and Carol Speed.
House of 1000 Corpses is a 2003 American exploitation horror film written, co-scored and directed by Rob Zombie in his directorial debut.
 The film stars Sid Haig, Bill Moseley, Sheri Moon, and Karen Black as members of the Firefly family.
 Set on Halloween, the film sees the Firefly family torturing and mutilating a group of teenagers who are traveling across the country writing a book.
 The film explores a number of genres, and features elements of the supernatural.
 Zombie cited American horror films "The Texas Chain Saw Massacre" (1974) and "The Hills Have Eyes" (1977) as influences on "House of 1000 Corpses", as well as other films released during the 1970s.
Sid Haig (born July 14, 1939) is an American actor.
 His roles have included acting in Jack Hill's blaxploitation films of the 1970s as well as his role as Captain Spaulding in Rob Zombie's horror films "House of 1000 Corpses" and "The Devil's Rejects".
 He had a leading role on the television series "Jason of Star Command", as the villain Dragos.
 He has appeared in many television programs including "Batman", "", "", "Gunsmoke", "The Rockford Files", "Buck Rogers in the 25th Century", "Get Smart", "Fantasy Island", "Sledge Hammer!
", "The A-Team", "The Fall Guy", "The Dukes of Hazzard" and "MacGyver".