In his trust, Gene Hackman left $80M to his late wife, Betsy Arakawa. It isn't clear if he named his three adult children in his trust (will). Some reports suggest he left nothing to them. Weird. This is further complicated because Arakawa's death preceded Hackman's.
Many rich people fall out with their kids and leave them nothing. When it comes to celebs, it often spills out in the press. One of my fav actors, Jerry Orbach, had his relatives fighting over his will. It's embarrassing. If you can't make your own life financially comfortable yourself, and need to rely on the death of your parents: you've got the wrong priorities. If my brother gets 100%, I could hardly care less. There's only so much money you need.
Jerry Lewis did the same with his kids. Joan Crawford, too.