Simon Posthuma and Marijke Koger, known as Seemon & Marijke, were a Dutch music duo. Born in 1939 and 1943, respectively, they met as part of The Fool, a design collective and band active in the late 1960s. They gained widespread recognition through collaborations with The Beatles, designing psychedelic visuals for the band. Seemon & Marijke released their debut album Son Of America in 1971 on A&M Records, produced by Graham Nash. Their single "I Saw You" became a hit in the Netherlands in 1972. They continued to release music, including the singles "Vegetable Stew" and "Keep On Keepin' On". Posthuma passed away on February 28, 2020.
