Dunderklumpen lives all alone in the mountains of Jämtland. One Midsummer's Eve when he feels very lonely he sets off on a journey to find friends.

• GK-Film Studio AB
• Beppe Wolgers
• Jens Wolgers
• Halvar Björk
• Håkan Serner
• Gösta Ekman
• Toots Thielemans
• Lotten Strömstedt
• Sif Ruud