Ariane, jeune fille russe is a 1931 French-German drama film directed by Paul Czinner and starring Gaby Morlay, Rachel Devirys and Maria Fromet.
 It was a French-language version of the film "Ariane" made a co-production.
 It was adapted from the 1920 novel "Ariane, jeune fille russe" by Claude Anet.
Hall Bartlett (November 27, 1922 – September 7, 1993) was an American film producer, director, and screenwriter.
The Fiddler of Florence (German: Der Geiger von Florenz) is a 1926 German silent comedy film directed by Paul Czinner and starring Elisabeth Bergner, Conrad Veidt and Nora Gregor.
 The film was shot on location in Italy.
 It premiered at the Gloria-Palast in Berlin.
 A girl escapes from her strict Swiss school and heads for Florence.
Dreaming Lips (German: Der träumende Mund) is a 1953 German drama film directed by Josef von Báky and starring Maria Schell, O.W. Fischer and Philip Dorn.
 It is a remake of the 1932 film "Dreaming Lips" by Paul Czinner.
 Czinner had also remade the film in Britain in 1937.
The Way of Lost Souls is a 1929 British drama film directed by Paul Czinner and starring Pola Negri, Warwick Ward and Hans Rehmann.
 A prostitute and a lighthouse keeper fall in love.
 It is also known by the alternative title The Woman He Scorned.
 Location shooting was done around Mevagissey in Cornwall.
 It was the first film made in Britain by Czinner, who later settled there with his wife Elisabeth Bergner after being forced out of Germany by the Nazis.
Paul Czinner (30 May 1890 – 22 June 1972) was a Hungarian Jewish writer, film director, and producer.
Dreaming Lips (German:Der träumende Mund) is a 1932 French-German drama film directed by Paul Czinner and starring Elisabeth Bergner, Rudolf Forster and Anton Edthofer.
 The film is based on the play "Mélo" by Henri Bernstein.
 As was common at the time, the film was a co-production with a separate French-language version "Mélo" made.
The Rise of Catherine the Great (also titled Catherine the Great) is a 1934 British historical film based on the play "The Czarina" by Lajos Bíró and Melchior Lengyel, about the rise to power of Catherine the Great.
 It was directed by Paul Czinner, and stars Elisabeth Bergner as Catherine, Douglas Fairbanks, Jr., as Grand Duke Peter, Dorothy Hale as Countess Olga, and Flora Robson as Empress Elizabeth.
Zero Hour!
 is a 1957 drama film directed by Hall Bartlett from a screenplay by Arthur Hailey, Hall Bartlett and John Champion.
 It stars Dana Andrews, Linda Darnell and Sterling Hayden and features Peggy King, Elroy "Crazy Legs" Hirsch, Geoffrey Toone and Jerry Paris in supporting roles.
 The film was released by Paramount Pictures.
The Loves of Ariane is a 1931 British-German drama film directed by Paul Czinner starring Elisabeth Bergner, Charles Carson and Percy Marmont.
 It was an English-language version of the 1931 film "Ariane".
 It was based on the 1920 novel "Ariane, jeune fille russe" by Claude Anet.
 The screenplay concerns a young woman studying at University who falls in love with Don Juan.
 A German version of the film, "Ariane" was also made.

Question: did both Hall Bartlett and Paul Czinner direct movies ?
Answer: yes