Katrina, Ranbir at Arjun Kapoor's birthday bash

Arjun Kapoor celebrated his 28th birthday in style. The B-town brigade was there to wish him the very best. Seen here are Katrina Kaif & Ranbir Kapoor arriving for the grand bash though not together.

Katrina and Arjun share a very warm relationship with Katrina calling Arjun her rakhi brother.