Kusserow was born in Wollstein, Province of Posen, Germany (today Wolsztyn, Poland).

[1] She starred in Nazi propaganda films during the Third Reich, which she wrote about in a 1949 memoir I Was Hitler's Mickey Mouse.

[2] Kusserow married Percy Graf Welsburg in November 1941; they hoped to get away to Switzerland and Italy but in fact had to remain in Berlin throughout the war, which she describes in a 1948 memoir Enough, no More.

They finally emigrated to Britain in 1947 and lived in St John's Wood, London[3] and she restarted her acting career, usually appearing as Ingeborg Wells.

She is known for her appearance in the 1951 film Captain Horatio Hornblower and in the German adaptation of the play You Know I Can't Hear You When the Water's Running.