Paul Giamatti leads the market at 47.5% implied probability for the 2027 Best Supporting Actor Oscar on the strength of early industry buzz around his A24 drama The Debut, where his overdue status and strong precursor potential have drawn trader interest ahead of fall festival screenings. Robert Pattinson sits at 14.8% tied to high-profile roles in The Odyssey and Dune: Part Three, while Miles Teller, Edward Norton, Sam Rockwell, and Steve Buscemi cluster in the single digits amid campaigns for films like Wild Horse Nine and Digger. With the race still more than six months from nominations and most contenders untested at scale, the wide field reflects historical patterns favoring late momentum shifts from guild nods, critics' groups, and box-office traction rather than early frontrunner lock-in.