We were chatting about the business of theatre and putting on plays and so on, and became really good friends,” McKellen said.
"Then this scene came up that you could tell would be rather romantic in the finished version with a beautiful river around us.
"We just kept looking at each other and being glad to be in each other’s company.
"Is that falling in love? Sort of.
"There’s a moment she just moves a bit of my hair, which I think was as much Cate as Galadriel. Peter, alert and watching with 3D glasses on, said ‘Are you two having an affair?’
"I said ‘Well, why not?’."