Getty Images
- Elon Musk and Grimes told Walter Isaacson about their first few dates together.
- Musk took Grimes for a spin in his Tesla and quizzed her on "Lord of the Rings," the biographer said.
- The couple has since said they've split, but they have two children together.
Walter Isaacson, Elon Musk's biographer, offered a window into the early days of the Musk's relationship with the singer Grimes on Monday.