Designed outfits for the concert tours of Madonna and Kylie Minogue.

Said on "Larry King Live" (1985) that he stopped celebrating his birthdays when he turned 30.

Although he states he was born in 1938, a Catholic baptismal record indicate his date of birth as 10 September 1933.

As he wanted to dress differently and wear the clothes of fellow designer Hedi Slimane, he lost 36 kilograms in one year, which led to a book called "The Karl Lagerfeld Diet".

Very good friends with Princess Caroline of Monaco.

Has done many photo shoots for celebrities, including Dakota Fanning.

When he collaborated with the Swedish fashion chain "H&M", which offered a limited number of his designs, almost all the clothes were sold out after two days (2004).