The man is a famous business English businessman who arrives at his hotel a few days early. So he ends up staying with a young women who works at the embassy. He then finds an Olympian who is also in the same boat and invites him to stay at the young women's house. The movie follows their shenanigans, and ultimately the Olympian and the women fall in love.

"Walk Don't Run" starring Cary Grant, Jim Hutton and Samantha Edgar.

That's the one, thanks a lot