Gregory Berns
himself
Roy Blanchard
Mihaly Csikszentmihalyi
Tenzin Gyatso
Richard Davison
Ed Diener
Daniel Gilbert
Tim Kasser
Sonja Lyubomirsky
herself
Nic Marks
Roko Belic
Director
Tom Shadyac
Executive Producer
Adrian Belic
Producer
Bhagyashree Raorane
Frances Reid
Hiji Han Shimizu
Jess Furman
Pamela Harris
Writer
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