Question: Are Clarence Brown and Peter Glenville of the same nationality?

Context articles: Peter Glenville
Tchin-Tchin
The Curious Savage
Clarence Brown
Véronique Vendell
The Prisoner (1955 film)
The White Cliffs of Dover (film)
Me and the Colonel
The Comedians (1967 film)
Out Cry

Peter Glenville (born Peter Patrick Brabazon Browne; 28 October 19133 June 1996) was an English film and stage actor and director.
Tchin-Tchin, also known as Chin-Chin, is a 1959 play written by Francois Billetdoux.
 It premiered at the Theatre de Poche in Montparnasse Paris in 1959.
 The author himself played the role of Cesareo Grimaldi and Katharina Renn played Pamela Pusey-Picq.
 The playwright Sidney Michaels translated it into English and it opened in London's West End as Chin-Chin in 1960 starring Celia Johnson and Anthony Quayle in the leads.
 It opened on Broadway at the Plymouth Theatre, (later transferring to the Ethel Barrymore Theatre) on October 25, 1962 and closed on May 18, 1963 after 222 performances and 3 previews.
 Directed by Peter Glenville, the play starred Margaret Leighton and Anthony Quinn, and featured Charles Grodin.
 Arlene Francis and Jack Klugman took over the star roles for the last month of the run.
The Curious Savage, written by John Patrick, is a comedic play about Ethel P. Savage, an elderly woman whose husband recently died and left her approximately ten million dollars.
 Contrasting the kindness and loyalty of psychiatric patients with the avarice and vanity of "respectable" public figures, it calls into question conventional definitions of sanity while lampooning celebrity culture.
 The play was first produced in New York by the Theatre Guild and Lewis & Young at the Martin Beck Theatre and opened October 24, 1950, with Lillian Gish in the role of Ethel.
 Peter Glenville directed the production.
Clarence Leon Brown (May 10, 1890 – August 17, 1987) was an American film director.
Véronique Vendell (born Véronique Duraffourd, 21 July 1942) is a French actress.
 She appeared mainly in French and German productions, but had roles in both Peter Glenville's "Becket" and Sam Peckinpah's "Cross of Iron" and its sequel "Breakthrough".
The Prisoner is a 1955 drama film directed by Peter Glenville and based on the play by Bridget Boland.
 The film stars Alec Guinness and Jack Hawkins.
The White Cliffs of Dover is a 1944 film based on the Alice Duer Miller poem titled "The White Cliffs".
 It was made by Metro-Goldwyn-Mayer, directed by Clarence Brown, and produced by Clarence Brown and Sidney Franklin.
 The screenplay was by Claudine West, and George Froeschel, with the credit for additional poetry by Robert Nathan.
 Nathan stated in an interview that he wrote the screenplay as his first work as a contract writer for MGM but the studio credited Claudine West who died in 1943 as a tribute to her.
Me and the Colonel is a 1958 film based on the play "Jacobowsky und der Oberst" by Franz Werfel.
 It was directed by Peter Glenville and stars Danny Kaye, Curt Jürgens and Nicole Maurey.
The Comedians is a 1967 film directed and produced by Peter Glenville, based on the novel of the same name by Graham Greene, who also wrote the screenplay.
 The stars were Richard Burton, Elizabeth Taylor, Peter Ustinov, and Alec Guinness.
Out Cry is a play by Tennessee Williams which was one version of "The Two-Character Play" by Williams.
 "Out Cry" premiered at the Ivanhoe Theatre in Chicago on July 8, 1971.
 It debuted on Broadway at the Lyceum Theatre with a preview on February 28, 1973 and then ran from March 1-10.
 The New York production was directed by Peter Glenville and starred Cara Duff-MacCormick as Clare and Michael York as Felice.