Ivor Novello (15 January 1893 – 6 March 1951), born David Ivor Davies, was a Welsh composer and actor who became one of the most popular British entertainers of the first half of the 20th century.
Guto Pryderi Puw (born 1971) is a Welsh composer, university lecturer and conductor.
 He is considered to be one of the most promising Welsh composers of his generation and a key figure in current Welsh music.
 Puw's music has been broadcast on BBC Radio 3 and been featured on television programmes for the BBC and S4C.
 He has twice been awarded the Composer's Medal at the National Eisteddfod.
The Constant Nymph is a 1933 British drama film directed by Basil Dean and starring Victoria Hopper, Brian Aherne and Leonora Corbett.
 It is an adaptation of the novel "The Constant Nymph" by Margaret Kennedy.
 Dean tried to persuade Novello to reprise his appearance from the 1928 silent version "The Constant Nymph" but was turned down and cast Aherne in the part instead.
Liam Sullivan (May 18, 1923 – April 19, 1998) was an American actor and singer, originally from Jacksonville, Illinois.
 He began acting while a student at Illinois College and continued in theater at Harvard University.
 In 1951 he began his career on Broadway appearing in "The Constant Nymph".
The Constant Nymph is a 1924 novel by Margaret Kennedy.
 It tells how a teenage girl falls in love with a family friend, who eventually marries her cousin.
 The two girls show mutual jealousy over their common love for the man.
The Constant Nymph is a 1928 British silent film drama, directed by Adrian Brunel and starring Ivor Novello and Mabel Poulton.
 This was the first film adaptation of the 1924 best-selling and controversial novel "The Constant Nymph" by Margaret Kennedy.
 The theme of adolescent sexuality reportedly discomfited the British film censors, until they were reassured that lead actress Poulton was in fact in her 20s.
Margaret Kennedy (23 April 1896 – 31 July 1967) was an English novelist and playwright.
 Her most successful work, as a novel and as a play, was "The Constant Nymph".
 She was a productive writer and several of her works were made into films.
The London Symphony Orchestra (LSO) has been associated with the cinema since the days of silent film.
 During the 1920s the orchestra played scores arranged and conducted by Eugene Goossens to accompany screenings of "The Three Musketeers" (1922), "The Nibelungs" (1924), "The Constant Nymph" (1927) and "The Life of Beethoven" (1929).
The Constant Nymph is a 1943 romantic drama film starring Charles Boyer, Joan Fontaine, Alexis Smith, Brenda Marshall, Charles Coburn, May Whitty, and Peter Lorre.
 It was adapted by Kathryn Scola from the Margaret Kennedy novel and play by Kennedy and Basil Dean, and directed by Edmund Goulding.
David is a short film made in 1951 about the Welsh miner and poet David Rees Griffiths.
 It was directed by Paul Dickson, who also wrote the script, shot by Ronald Anscombe, produced by James Carr, and distributed by Regent Films.
 Leading Welsh composer Grace Williams wrote the score for the film.
 The film is 38 minutes long and was given a U certificate.
 It was the Welsh contribution to the Festival of Britain film festival.

Question: Which Welsh composer directed The Constant Nymph?
Answer: Ivor Novello