Yes, Al Pacino and Ellen Barkin had a brief romantic involvement.
Details of Their Fling
Their connection developed into a brief fling in 1994, specifically while they were working on the film Fear And Loathing In Las Vegas. According to Ellen Barkin herself, their romantic liaison was quite involved. She stated that they slept together three to four times a week, a consistent pattern that lasted for a significant period of five months. This personal chapter provided a unique dynamic to their professional association during that time.