Watch Thoroughly Modern Millie (1967) (1967) HD Full Movie Free on SolarMovie. Watch Thoroughly Modern Millie (1967) (1967) online free. In New York City during the Roaring Twenties, would-be flapper Millie Dillmount's self-appointed mis...In New York City during the Roaring Twenties, would-be flapper Millie Dillmount's self-appointed mission to marry her boss is complicated by white slavers and true love.