British actor Bill Nighy says smoking is his ‘greatest regret. The’Love Actually’ and ‘Boat That Rocked’ star admits his life has changed for the better since he kicked his 30-year habit, and strongly advises others not to take it up. When he first quit cigarettes, Bill replaced the habit with eating sweets but has now cut sugar from his diet and is feeling the benefits. Says the actor, “I don’t have a strict regime but I do a bit of exercise and I try not to put things in my body that might hurt me.”