-LIFEHollywood combed two continents before selecting a 17-year-old Iowa girl to play Saint Joan, the theater's-most exacting role.BY PEEfPENH EIM E PElvery actress—whether she's a teen-age amateur in Iowa or an international star' in Paris— has her dreams, and generally they’re about portraying the. most dynamic woman in history or drama, Joan of Arc.That amateur in Iowa, however, is usually content if she wins a high-school speech contest by reciting excerpts from Maxwell Anderson’s “Joan of Lorraine.”1 What more can an inexperienced schoolgirl expect? Certainly not greater triumphs inShaw, whose “Saint Joan” he is bringing to the screen, Preminger believes the “make-believe Maid of Orleans should be; about as young and unknown as Joan herself was-And among the millions: of entries in his talent: hunt is one describing that teen-age Iowa girl. It has been submitted by: a friend and neighbor who doesn’t realize the tremendous odds or understand that sometimes Hollywood doesn’t mean what it says.His efforts result in a telegram delivered to col-Jean has played her role well. She inger’s “fresh.” Saint Joan!i *. .Call it luck, coincidence, or the; tri this is the Cinderella story of an acti screen appearance will be a major evei film season.Filming of “Saint Joan” has beennervousness and awe still are very jJean Seberg. She’d be ignorant of th role if they weren’t.