Here’s a video of a BAFTA-related interview with J. K. Rowling, David Heyman, Rupert Grint, and Emma Watson. Enjoy!
This quote from snitchseeker.com made me laugh: “When asked if she ever pictured the actors while writing her books, Jo Rowling joked that she could imagine Rupert while she put Ron Weasley in embarrassing situations.” Listen for that part in the video. 
I found this on Tumblr. So hilarious!
I also loved J. K. Rowling’s description of Emma’s reaction to the idea of kissing Rupert Grint and Daniel Radcliffe: Emma laughed so much that she rolled off of the sofa!
Here’s great another video of J. K. Rowling discussing that same topic. 
Aren’t these videos great? Rowling is so awesome!
phoenixweasley
I loved that interview! What Rowling says about Emma is really funny. And when she says that sometimes she imagined Rupert when Ron did something embarassing I love how Rupert is blushing haha, he’s so adorable