Edwin de Vries and his spouse Monique van de Ven both have cameos. De Vries plays the Cuban customs officer, van de Ven is the nurse who looks after the comatose Ada.
After all the auditions for 16-year-old Quinten were done without much success, Jeroen Krabbé stared out of the window and Neil Newbon happened to pass by. "That's what Quinten should look like" he mumbled, not yet knowing the guy was an actor.
The wedding scene of Onno and Ada is recorded at same place that director Jeroen Krabbé had his wedding in 1964. Onno is even wearing the exact same tie that Jeroen Krabbé wore at his wedding.