Question: Who stars in the film "Going Under" that is a Welsh actor and director?

Context paragraphs:
Kevin Allen (actor): Kevin Allen (born 15 September 1959) is a Welsh actor, screenwriter, film director and film producer.  He is noted for writing and directing the cult black comedy feature "Twin Town" set in Swansea (1997).  The film was entered into the 47th Berlin International Film Festival.

Craig Roberts: Craig Haydn Roberts (born 21 January 1991) is a Welsh actor, writer and director.  He is best known for his lead roles as Oliver Tate in the coming-of-age comedy-drama film "Submarine" (2010), David Meyers in the series "Red Oaks" (2014–present), and for playing Rio in the television series "The Story of Tracy Beaker" (2004–2005).

David Bower: David Bower (born 1969) is a former Welsh actor, best known for his role as David in the hit romantic comedy "Four Weddings and a Funeral".  Born in Wrexham, North Wales, he is deaf and took his degree in the "Theatre of the Deaf".  After university he joined what became the "Signdance Collective" working as sign dancer and choreographer.  The collective was re-established in 2001 with Bower as Artistic Director and Isolte Avila as Dance Director.  In 2012 the collective is devising a new production "Desire", featuring the songs of the band Dead Days Beyond Help, which will premier at the Warehouse Theatre, Croydon from 13–19 April 2012.

Dyfan Dwyfor: Dyfan Dwyfor is a Welsh actor, originally from Criccieth and now living in London.  He attended Ysgol Eifionydd, Porthmadog and Coleg Meirion Dwyfor before going on to Ysgol Glanaethwy.  He graduated from the Royal Welsh College of Music & Drama in 2007.

Going Under (2004 film): Going Under is a 2004 drama film about a married man and a partnered dominatrix who form a personal relationship and begin seeing each other outside her workplace.  The film stars Geno Lechner and Roger Rees and was co-written and directed by psychotherapist Eric Werthman.  Its first public showing was in 2004 at the São Paulo Film Festival.  It debuted theatrically in 2006 in New York City, and was released on DVD in 2007 through the independent company Blue Underground.

Keith Allen (actor): Keith Howell Charles Allen (born 2 September 1953) is a Welsh actor, comedian, musician, singer-songwriter, artist, author, and television presenter.  He is the father of singer Lily Allen and actor Alfie Allen, and brother of actor and director Kevin Allen.

Ray Milland filmography: This is a filmography of Welsh actor Ray Milland, containing his work in theatrically released motion pictures as well as his extensive television credits.  Milland began his film career in United Kingdom in 1929 after serving three years as a guardsman in the Royal Household Cavalry, based in London.  After appearing in several British films, he came to the United States in 1930 where he spent several years playing small and supporting roles.  Eventually, in 1934, he became a contract player at Paramount Pictures where he established himself as a popular star.  Milland remained with Paramount for the next 21 years.  During his time with the studio, he developed his persona as a debonair leading man, mainly in drawing-room comedies but also occasionally in adventure and mystery films.  In 1945, Milland won the Academy Award for Best Actor for his portrayal of an alcoholic writer in "The Lost Weekend".  From there he continued as a leading man well into the 1960s, appearing in several film noirs and occasionally cast as a villain.  In 1953, Milland began working in television as both an actor and director.  He alternated between the mediums of film and television for the remainder of his career.  During the 1960s and 1970s, Milland frequently worked in science fiction and horror films.  He also directed himself in four films.

Roger Rees: Roger Rees (5 May 1944 – 10 July 2015) was a Welsh actor and director, widely known for his stage work.  He won an Olivier Award and a Tony Award for his performance as the lead in "The Life and Adventures of Nicholas Nickleby".  He also received Obie Awards for his role in "The End of the Day" and as co-director of "Peter and the Starcatcher".  Rees was posthumously inducted into the American Theater Hall of Fame, 16 November 2015.

Aneirin Hughes: Aneirin Hughes (born Aneurin Hughes, 8 May 1958) is a Welsh actor and singer known for playing Chief Superintendent Brian Prosser in the BBC4 Welsh police drama "Hinterland".  He won a Best Actor BAFTA Cymru (or BAFTA Wales) for his appearance as Delme in "Cameleon" (1997), a Welsh language film.

Huw Garmon: Huw Garmon (born 1966) is a Welsh actor, probably best known for playing the eponymous lead in the Oscar-nominated Welsh language film "Hedd Wyn" (1992).  He has also taken part in various television series and has currently taken an academic post at Glyndŵr University, combining it with his acting roles.

Supporting paragraphs: Going Under (2004 film) Roger Rees
Answer: Roger Rees