Birthday boy Aamir Khan,who turned 48 today,will be celebrating his birthday away from home in Switzerland where he is shooting for Yash Raj Film's Dhoom: 3. The actor,who was also absent from the parties hosted for Steven Spielberg in Mumbai,is currently shooting for the climax scene of action film Dhoom 3 with Abhishek Bachchan,Uday Chopra and Katrina Kaif. According to reports,cast and crew of Dhoom: 3 might throw a party for the actor. Meanwhile,Aamir's friends took to Twitter to wish Mr Perfectionist a very happy birthday. Karan Johar: Happy birthday @aamir_khan..have a dhoom of a year!!! Lots of love!!!" Kunal kohli: @aamir_khan chaand sifarish jo karta tumhari deta woh tumko bata . you are one of the finest actors,but an even finer human being & friend. In pics: Aamir Khan turns 48