Of his first Dutch album in 1974, Vroeger of Later (Sooner or Later) more than half a million records were sold and continued to be a best seller for 118 consecutive weeks.

In the late 80s Long appeared on television presenting a show called Mijn geheim (My secret).

A selection of these columns was released in a book in 1990 using the title Vandaag geen nieuws (No news today).

Together with Dimitri Frenkel Frank Long composed the Dutch musical Chekhov (based upon the life of the Russian writer Anton Chekhov), which was a big success in the Netherlands, but the German version in which Long also participated, was less popular.

The marriage ceremony was performed by fellow singer and actor Gerard Cox, a close friend of Long.