Hugh Grant and Robert Downey Jr. share a mutual hate since they co-starred in 1995’s “Restoration”.
Downey said publicly about Grant shortly after filming,
–“Don’t know, I just think he’s a jerk. I think he’s kinda self-important, kind of, like, boring flash-in-the pan a—hole Brit.”-
Hugh Grant confirmed on-set tension in a 2018 interview,
—“He hated me. He took one look at me and wanted to kill me. I was so hurt. I could but I refuse to trash talk the Junior Mr. Downey.”