This leading lady's first two film appearances, as the love interest to a drunken writer in "Reuben, Reuben" (1982) and the soft-spoken Amish widow in "Witness" (1985), displayed a promising mix of talent and earthy beauty. Kelly McGillis' career, however, stumbled a bit after playing Tom Cruise's love interest in "Top Gun" (1986) as her forays into straightforwardly glamorous roles have earned relatively lukewarm critical responses.McGillis dropped out of high school to pursue a career as an actor and eventually attended Juilliard in Manhattan. She understudied the role of Dona Elvire in a