Furniture designed by Kastholm has appeared in several films and series, including: The Girl and the Millionaire, Captain Scarlet and the Mysterons, Rollerball, Who Am I?, The Devil Wears Prada, Old Dogs, The International, Up in the Air, The Ghost Writer, Fair Game, X Factor, and A Most Wanted Man.
[citation needed] Kastholm was born in Roskilde and attended Kostskole until 1946, then studied abroad in the United States until 1950.
He attended the School for Interior Design (Danish: Skolen For Boligindretning) in Copenhagen where he studied under Finn Juhl.
[citation needed] It was while studying at the Design School that Kastholm met cabinetmaker Preben Fabricius who became his partner for a number of years.
I had been to the United States and seen furniture by Eames and Mies van der Rohe and it inspired us.
"[2] In 1961, the pair set up a design studio in a Gentofte cellar without any firm arrangements with manufacturers.
Kill had a reputation for high quality but initially Fabricius and Kastholm were not keen to design furniture for factory production.