Anecdotes

He was the subject of indie band Half Eye's seven-album repertoire: the first letter of the album names spell out his name: U.D.O. K. I. E. R.

Can speak at least three languages, including German, English and Danish.

Loves horror movies, and has a particular fondness for playing vampire characters.

He also sings.

Is the godfather of director Lars von Trier's daughter Agnes.

Collects designer furniture.

In 2020 he was invited to join the Academy of Motion Picture Arts and Sciences.

Starred in Madonna's music video for her song 'Deeper And Deeper '.

Starred in Paul Morrissey's back-to-back horrors, Du sang pour Dracula (1974) and Chair pour Frankenstein (1973). Of the two, Udo says he prefers "Blood for Dracula".