Audrey Hepburn as 'Joey' instead of the disasterous Houghton.
I'm watching it right now and I find myself unable to look at the screen when Katharine Houghton is "performing". She is just horrible. Even with Tracy/Hepburn/Portier(how can you beat this!) I've always had a hard time watching this film through to the end. It's because of her. Jeez, she's worse than horrible.
And no, it's not the character she's portraying. It's her. No ability and no chemistry between her and any other characters. My gawd, you can almost feel Portier cringing in scenes with her. I equate watching her to having a 3/4" drill bit bored into my forehead.
Audrey Hepburn could've portrayed the same character and would have done a perfect job. Yes, she was a few years older than this Houghton disaster but she could've been "younged up", if need be, even though the age difference between the two characters never really became an issue. Putting her in this film would have made this a truly great film.
I doubt that "In The Heat Of The Night" could've been beat for Best Picture but Houghton certainly made the choice easier by being in this film. Actually, almost anyone instead of Houghton would've made this a much better film but Audrey gets my vote.