The Knack... and How to Get It
Starring Rita Tushingham, Ray Brooks, Michael Crawford, William Dexter, Peter Copley, Wensley Pithey, Donal Donnelly, John Bluthal, Charles Dyer, Jane Birkin
It's a comedy and romance movie, and has a rating of 6.3 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Germany.