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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Costar of 17 Across 11 letters:

CYDCHARISSE: 17-Across costar in "Silk Stockings"
DICKVANDYKE: Costar of 17 Across
GINGERROGERS: 17-Across costar in "Swing Time"
RITAHAYWORTH: 17-Across costar in "You'll Never Get Rich"
JULIEANDREWS: Costar of 17 Across