How many letters does the top answer for “wrote annie hall” have?

The most common answer is allen (5 letters).

Crossword clue: wrote annie hall

1 answer 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)

wrote annie 67% similar → huston

author of annie hall 50% similar → allen

wrote wolf hall 50% similar → mantel