The 30-year-old actor has worked in more than 15 films in her six year-long career in the South, before making a debut in the Hindi film industry with "Barfi!" in 2012.
"I keep joking, I was the Akshay Kumar of South, I used to do four films a year. He does good films, but some films of mine were good, some weren't. I was just signing films, there wasn't this thing of 'wanting to do good work'," Ileana told PTI.
"I told myself, this is never really going to last for a long time, about time I start doing good work. Then I put my head into it completely... I had no idea about the South film industry and how it worked.
"When I was offered a film there, I thought how would I do it, I don't even speak the language. When I started doing it, I was like anyway people won't watch my film even if I do bad in it. It was a very stupid, carefree and careless attitude that I had."
More From This Section
"I did get Bollywood offers even before my first South film and I am thankful that I didn't make a mess of it. If I had done a Bollywood film, which has far more exposure than the South ones even though they get released worldwide, I would have made a fool of myself."
The actor says she was in two minds about "Barfi!" as well, which was both a critical and commercial success.
"I was actually going to back out of 'Barfi' as well, because I wasn't sure. I took three months to sign it. There was something about the story. I don't know if I will ever get to do a story like this. I decided on a whim to do it."
"I was offered a film of my own which was 'Wanted' with Salman Khan. I was actually going to do it. I was happy that my first film would be with Salman.
"I remember I had exams on back then. So when Boney (Kapoor) sir asked me to do the photo shoot, I was like 'I am sorry, I have exams on. I can't. I didn't think I handled it well back then because I didn't understand the gravity of the offer. For me, it was all about finishing my exams.