How many letters does the top answer for “who played the sun baby in the original run of teletubbies” have?

The most common answer is jessica (7 letters).

Crossword clue: who played the sun baby in the original run of teletubbies

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

jessica 7 letters otdb

smith 5 letters otdb

someone who works metal (especially by hammering it when it is hot and malleable)