In addition to her appearances on the television series Dragnet and Bachelor Father, she appeared as Roxy Howard, the title character in the Perry Mason episode, "The Case of the Nervous Accomplice". Thyssen also appeared on Broadway in Pajama Tops as a replacement for June Wilkinson.
Thyssen is probably best remembered for her appearances in the Three Stooges films Quiz Whizz, Pies and Guys and Sappy Bull Fighters. From 1956-1958, Thyssen was the original Pirate Girl on the game show Treasure Hunt, assisting host Jan Murray with presenting prizes hidden in miniature treasure chests. After appearing in the musical comedy Cottonpickin' Chickenpickers (1967), she retired from acting.
Thyssen died of pneumonia in 2018 at her home in Manhattan, aged 90.
These glamorous photos that show the beauty of this Danish blonde bombshell in the 1950s and 1960s.