Mumbai: The real story behind Katrina Kaif opting out of 'Dhoom 3' to work with her ex beau.

Life is all about making choices. And, Katrina Kaif has made hers by choosing Karan Johar and her ex beau Ranbir Kapoor over Yash Raj and Aamir Khan. Though, it wasn't an easy decision for her.

Kat had committed to a film with Karan Johar a long time back, and she was also supposed to star in Yash Raj banner's Dhoom 3 starring Aamir Khan.

As destiny would have it, both films are going on the floors at the same time. So the pretty actress was forced to choose between the two films.

Since it was a difficult decision, instead of taking the call herself, the sensible star decided to play it safe. "She asked both her filmmakers to sit together and take a call on which film she should do," reveals a source close to her.

The source adds, "Katrina has worked with most of the big banners, but for some reason she has not got the opportunity to work with Dharma Productions. Karan and she were very keen on working together, and were waiting for the right film to come their way."

Reportedly, she was supposed to star in Karan's Dostana sequel. But since it has been put on a backburner, Karan offered her his next Ayaan Mukherjee's film starring Ranbir.

On the other hand, Aditya Chopra was very keen to have Katrina in Dhoom 3. He thought she would be perfect, and her pairing with Aamir would bring on a whiff of freshness.

Couldn't the filmmakers shift their dates if both of them were so keen on casting Katrina? The source explains, "Adi can't tell Aamir to shift his dates for an actress. And Ranbir's dates can't be moved because he has a packed schedule. So the only option left was for Katrina to choose either of the films.

“Adi spoke with Karan over phone and they mutually decided that Kat should do Karan's film. With heavy heart, Adi gave away his actress to Karan since the latter has never worked with her," same source adds.

The source says, "It's been a difficult decision for Katrina as well. She was looking forward to working with Aamir, and is quite disheartened to let go of such a good opportunity."

Well, there is still hope for Katrina, that is, if Aamir Khan decides to shift his dates.