Pride & Prejudice (Elizabeth Bennet) ENFP
As played by Keira Knightly, yes. In the novel, I'd say INFJ, maybe eNFJ. Definitely a Fe type in the novel.
A Jane Austen heroine who is INFP enneagram 9w1: Fanny Price.
Julie Delpy seems to play ENFPs a lot:
Celine in Before Sunrise/Sunset - relatively healthy eNFP (seems close on I/E)
Marion in 2 Days in Paris - unhealthy ENFP
Other ENFPs in movies include the cliche bohemian woman who comes unexpectedly into the life of the xxTJ man, turns his world upside down, teaches him how to live & love, and he helps her deal with whatever crazy stuff her chaotic lifestyle has reaped; movie is as likely to end with them parting ways after learning from each other as much as a happily ever after. You know you've all seen that movie.... ENFPs pop up in movies a lot, but they're not necessarily all well-written...
INFP:
Annie Hall - I watched this recently, the first time after knowing MBTI, & it was sooo obvious she is INFP.
Amelie - I know most see her as INFJ, but she's the #1 film character I can relate to. Let's forget the functions and call her INFx. I won't give her up!

. I think the movie as a whole has a very INFx vibe anyway.
Debbie in Grosse Pointe Blank - or an eNFP? The whole movie seems INxx to me.
Caden in Synecdoche, New York - INFP or ISFP? Movie has an NF vibe though, IMO.
I thought Margo was an INFP and Richie was an ISFP.
Yes on Richie...Margo is hard to say, as she is so quiet, but if not INFP, then INTP.