This is what Katrina did on Ranbir's birthday

"Katrina was planning this party with Ayan Mukherji since a long time. It's Ranbir's birthday and she wanted to make it special for him. Accordingly, she planned a quiet, cosy dinner with their close friends. She was already in touch with of Ranbir's close friends, including Rohit Dhawan and a couple of Ranbir's school friends. Ranbir was thrilled to catch up with them over this surprise dinner," a source said.