Billie Eilish explains how dating changed her view of astrology Billie Eilish never believed in astrology until she dated a "Gemini man". 30 April 2026 Billie Eilish started believing in astrology after dating a "Gemini man". Billie Eilish believes in astrology The 24-year-old singer admitted she used to completely dismiss all conversations about the zodiac but changed her mind when she went out with a guy whose birthday fell between 21 May and 20 June and realised how many of the typical characteristics of his star sign he had.