Shirley MacLaine made her film debut a scant four years earlier in The Trouble With Harry and in her third film, Around the World in 80 Days, co-starred with David Niven. Reportedly they did not get along on the set, Niven felt she wasn't suited for the part of a Hindu princess and after seeing it I think you would agree.
MacLaine really made her mark in the following year by blowing all the rest of the cast off the screen in Some Came Running. Had it not been the year for Susan Hayward's I Want to Live, Shirley would have gotten her Oscar back in 1958. David Niven had won his Oscar in 1958 for Separate Tables so both of them were box office then.
Seemed only natural team them up again and this time MacLaine is most suitable for her role as a hopeful career girl in Ask Any Girl. Shirley's fresh from the country having made her way to New York in the hopes of getting a career going and/or landing husband. She develops quite a few potential suitors along the way.
Ask Any Girl is a combination of Sabrina plus elements of any number of Doris Day vehicles that came out at that time. Eventually Shirley winds up at an advertising agency run by two brothers. Older brother David Niven runs the agency and younger brother Gig Young views the place as fertile ground for female companionship.
MacLaine exasperates Niven, she's not real good at anything, but he's given up all hope in Young just settling down and tending to business. He sees maybe MacLaine just might be what Young needs, or maybe just what the elegant, but stuffy Niven needs.
The principal players go through roles they were all seasoned veterans at handling. Ask Any Girl is pleasant enough entertainment though looking back I wonder just what the very outspoken feminist Shirley MacLaine thinks of this husband hunting woman she plays here.