Mumbai, Oct 14: Akshay Kumar today praised his "Namastey London" co-star Katrina Kaif, saying she has become one of the biggest stars of Bollywood due to hard work and determination. Akshay and Katrina were present at the Kudo Tournament prize distribution event here. "I had told her (Katrina) about this event three-four days back and she agreed within seconds to be part of this. We all are fan of her. I know her since the time she entered the film industry... She had told me that she wants to work in Bollywood, I salute her, I admire her for what she has achieved today. "A person should have passion and determination towards their job. She is the biggest superstar of Bollywood today. You can also become like her provided you have the will and determination," Akshay told reporters. Akshay and Katrina have acted together in films like "Humko Deewana Kar Gaye", "Namastey London ", "Welcome", "Singh is Kinng", "De Dana Dan" and "Tees Maar Khan".