Question: Are Jean M. Auel and Noël Coward both playwrights?

Context articles: Graham Payn
I Went to a Marvellous Party
Noël Coward at Las Vegas
London Calling! (musical)
Forbidden Fruit (Noël Coward song)
Jean M. Auel
Noël Coward
Noël Coward Society
Twentieth-Century Blues: The Songs of Noël Coward
Words and Music (musical)

Graham Payn (25 April 1918 – 4 November 2005) was a South African-born English actor and singer, also known for being the life partner of the playwright Noël Coward.
 Beginning as a boy soprano, Payn later made a career as a singer and actor in the works of Coward and others.
 After Coward's death, Payn ran the Coward estate for 22 years.
"I Went to a Marvellous Party" (sometimes known as "I've Been to a Marvellous Party") is a song with words and music by Noël Coward, written in 1938 and included in the revue, "Set to Music".
 Although a melody exists, the text is most often recited over a piano accompaniment.
 Out of Noël Coward's approximately 300 songs, this piece is one of his most popular, ranking among the top 30 in royalty potential.
Noël Coward at Las Vegas is a 1955 live album by Noël Coward.
London Calling!
 was a musical revue, produced by André Charlot with music and lyrics by Noël Coward, which opened at London's Duke of York's Theatre on 4 September 1923.
 It is famous for being Noël Coward's first publicly produced musical work and for the use of a 3-D stereoscopic shadowgraph as part of its opening act.
 The revue's song "Parisian Pierrot", sung by Gertrude Lawrence, was Coward's first big hit and became one of his signature tunes.
"Forbidden Fruit", also known as "It's The Peach", is an early Noël Coward song written in 1915, but not publicly performed until 1924 and not published until 1953.
 Although another early song, "Peter Pan" was the first to be recorded, in 1918, Coward considered "Forbidden Fruit" to be his first full-length song, already exhibiting Coward's trademark "worldly cynicism", risque lyrics, and "love of the internal rhyme."
 Musical theatre writer Stephen Citron concluded that the song's "musical rhythms, phrase lengths and especially its melodic sophistication are all harbingers of a more mature Coward."
Jean Marie Auel ( ; "née" Untinen; born February 18, 1936) is an American writer who wrote the "Earth's Children" books, a series of novels set in prehistoric Europe that explores human activities during this time, and touches on the interactions of Cro-Magnon people with Neanderthals.
 Her books have sold more than 45 million copies worldwide.
Sir Noël Peirce Coward (16 December 189926 March 1973) was an English playwright, composer, director, actor and singer, known for his wit, flamboyance, and what "Time" magazine called "a sense of personal style, a combination of cheek and chic, pose and poise".
The Noël Coward Society is an international society founded with the agreement of Coward's literary agent and Estate to celebrate the life and work of Sir Noël Coward.
Twentieth-Century Blues: The Songs of Noël Coward is a 1998 Noël Coward tribute album curated by Neil Tennant, who invited prominent artists of the day to reinterpret Noël Coward’s songs for the late 20th century.
Words and Music is a musical revue with sketches, music, lyrics and direction by Noël Coward.
 The revue introduced the song "Mad About the Boy", which, according to The Noël Coward Society's website, is Coward's most popular song.
 The critics praised the show's sharp satire and verbal cleverness.