Dan Gilroy was born in Santa Monica, California, the son of Pulitzer Prize winning playwright Frank D. Gilroy, and sculptor and writer Ruth Dorothy. His brother Tony Gilroy is a screenwriter and director; and his fraternal twin brother, John Gilroy, is a film editor. Through his father, he is of Italian, Irish and German descent.
- Fecha de nacimiento: 1959-06-24
- Lugar de nacimiento: Santa Monica, California