How many letters does the top answer for “author of midnight in paris” have?

The most common answer is allen (5 letters).

Crossword clue: author of midnight in paris

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

allen 5 letters wd-fact-v3

a soldier of the American Revolution whose troops helped capture Fort Ticonderoga from the British (1738-1789)

wilson 6 letters wd-fact-v3

a peak in the San Juan mountains of Colorado (14,246 feet high)

wrote midnight in paris 50% similar → allen, wilson