Billy Crudup is opening up about parenthood. The actor, 57, revealed he and his ex Mary-Louise Parker  still have one thing in common following their contentious 2003 split: their son William, 21. During an interview with The Times published on Thursday, Crudup was asked if he and Parker, 61, are on better terms today than they were during their initial breakup. “Well, without commenting on any of our … Our adoration for our son is boundless,” the “Morning Show” star gushed. “He has, through