The book publisher's Ink Splot blog has a lengthy interview with the two who plays Hermione and Harry respectively in anticipation of the Deathly Hallows, Part 1 release.
In this bit, Emma talks about the party she put together for the cast on the final day of filming:
I threw a dinner. I just bought a new apartment in London. I tried to make it look really nice. I bought tons of flowers. I lit candles everywhere and everyone had place settings and I made food for everyone to come and eat and also I put together . . . I made like a book for everyone and I had silly questions like who was your first crush on the set? What was your best memory? What was your worst memory? Who was your favorite director? . . stuff like that, that's just really fun. And everyone had a piece of paper to write it all down, but we all discussed our answers and went around and listened to people's stories and what they remembered. It was just a really nostalgic evening basically, just all of us sharing stories. It was a really nice evening and it was warm weather, so we sat outside as well, and I bought disposable cameras for the tables, so everyone could use those, and it was just fun. It was just chill.
If you haven't ordered your tickets for Deathly Hallows, Part 1 yet, click here to do so through Fandango!