Line Hatland
Narrator
Robert Biswas-Diener
Himself
John Cacioppo
Himself
Ed Diener
Himself
Sonja Lyubomirsky
Herself
Robert Schwartz
Himself
Ruth Veenhoven
Herself
Joar Vittersø
Himself
Line Hatland
Hvor lykkelig kan du bli?
Released
Bande-annonce