Top stars Rajinikanth and KamalHaasan on Thursday condoled the death of Hindi cinema veteran Rishi Kapoor.Rajinikanth, who had acted with Kapoor in the Hindi flick 'Dosti Dushmani', described him as a "dearest friend" while Haasan expressed disbelief over his "Saagar" co-star's demise following his battle with cancer."Heartbroken ... Rest In Peace ... my dearest friend #RishiKapoor," Rajinikanth said in a tweet.Haasan recalled Kapoor was always ready with a smile."Can't believe it. Chintu ji @chintskap (Mr Rishi Kapoor) was always ready with a smile. We had mutual love and respect. Will miss my friend. My heartfelt condolence to the family," he said.The 67-year old Rishi Kapoor, who was suffering from cancer, died in a Mumbai hospital on Thursday.