How many letters does the top answer for “which actress portrayed dr. grace augustine in the james cameron movie avatar” have?

The most common answer is sigourney (9 letters).

Crossword clue: which actress portrayed dr. grace augustine in the james cameron movie avatar

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

sigourney 9 letters otdb

weaver 6 letters otdb

finch-like African and Asian colonial birds noted for their elaborately woven nests