"Fitness is like brushing your teeth. You must include fitness to your daily life. For 'Humshakals', I had to lose 5 kg. So, I went to this famous dietiecian - Pooja Makhija - and she gave me a new diet plan," Tamannaah told IANS.
"I am allowed to eat everything - rice, pastas, and nuts, but controlled portions. At one point of time you don't eat too much of anything and it really helped me to lose weight," she added.
A known name down south, the actress started working out "six years back".
She said: "I was a fussy eater. I had to pull down a few kg to look a certain way. People should not enter into dieting without any guidance. You should take professional help."
"I always kept myself fit compared to other people because I feel if your lifestyle is not fit, then you can't work properly. If your lifestyle is unhealthy, it will reflect on screen," she added.
Scheduled for a June 20 release, director Sajid Khan's "Humshakals" stars a host of big names like Saif Ali Khan, Riteish Deshmukh, Bipasha Basu, Esha Gupta and Ram Kapoor.