123Movies. Pianist Stefan Nilsson died in his home on May 25. He is best known as a composer of music for popular films and television series. In February 2023, after a period of illness, he received shocking news - he had the incurable disease ALS. Stefan Nilsson and his wife Charlotte Hasselquist Nilsson then contacted Tom Alandh and it resulted in a conversation about life, love and Stefan Nilsson's rich musical work.