The actress had dated Ranbir for some time and even featured with him in the hit movie "Bachna Ae Haseeno" before parting ways.
If Deepika pats herself for doing "Cocktail", she candidly admits that some of her films disappointed her.
"I don't regret anything but, yes, I have been disappointed with two to three films that I did in the last two years," the 26-year-old said.
"I put equal amount of effort to each and every film but when it doesn't work, it is very disappointing. All of us face ups and downs in our lives, but all we can do is we can learn from our experiences."
However, she refused to name those disappointing films, saying it would be "unfair to name any films because ultimately it's me who had chosen the film ... so I would never name them".