Ilya Sulkind, who produced Warner's highly successful "Superman" movie franchise in the late-1970s, has been missing from his Mexico City vacation home since Sunday.
According to his longtime business partner, John Palmer, a missing persons report has been filed with Mexican authorities.
The 63-year-old Sulkind, who was born in Mexico City, last spoke with his staff on Sunday, reporting that he was going to run some errands.
However, he left his cell phone at his home and has not been in contact with friends and work associates since.
"It's not that we're not concerned, but in the back of my mind, I hope that he's gone on his own little sojourn," Palmer told TheWrap. "Chances are good that he's enjoying himself."