Katrina breaks her silence on Ranbir

Katrina Kaif, who is currently in news for her alleged romance and break-up with actor Ranbir Kapoor, says these are 'just rumours'. "They are a part and parcel of the industry. One has to smile and concentrate on work," said Katrina.

When asked if she was ever dating Ranbir, Katrina said: "I have never commented on my personal life. And will not do so now."

Media reports suggested that Ranbir's Rockstar co-actor Nargis was responsible for their alleged break-up.

Serious PDA high up in the air, long and fast drives in red-hot cars, sizzling on-screen chemistry, mid-night meets- even when they were dating they never confirmed. At least not verbally.

We kept asking dating or not? Here's how their so-called love story started.

Reportedly Ranbir and Katrina's 'Ajab Prem Ki Gazab Kahani' began with their first movie appearance together. We could totally picture them as a couple off screen but the question was, could they?

The answer was yes – Katrina was not proof against Ranbir's famous charms. Already on shaky ground with long time boyfriend Salman Khan, rumours got fast and furious as Kat got cosy with Ranbir on set.

As Bollywood's bad boy, this was Salman's cue to signal red for danger. So we were all more than mildly surprised when Kat followed up Ajab Prem Ki Gazab Kahani with a second appearance opposite Ranbir in the critically acclaimed Raajneeti.

In the year that passed it was anybody's guess who was dating who until Salman let the Kat out of the bag out of the blue at a press conference for Dabangg, hinting at trouble in paradise

Had Katrina finally given up the Khan as a bad job after sticking by him as he went to jail? Apparently she had, saying “ If Salman says he is single, so am I.”

But, in a first for Salman, his break up with Katrina was the most amicable ever. Was it the seven year itch or the RK factor? Neither is telling.

It's probably safe to say that Ranbir, famed for dating his co-stars, was busy making moves on Kat

And as is normal in Bollywood, Ranbir and Kat tiptoed around trying hard to keep their relationship under wraps

But was Salman left entirely in the cold? In December 2011, Kat appeared on Bigg Boss to promote her new movie, Tees Maar Khan. Salman couldn't help but indulge in some flirty banter, nor could he stop himself from taking a dig or two at her rumoured new beau

Wait, there's more - Katrina turned up at Salman's home at Christmas. Was there a reunion on the cards? Or was she just hanging out with his family?

Then came some taxing times for the actress as IT officials raided her house. Rumour has it, that Ranbir narrowly escaped running into the taxmen at Kat's place, unlike the less fortunate Shahid Kapoor who was caught at Priyanka Chopra's

A spin in Ranbir's red Audi and a public appearance at Karan Johar's party indicated that Ranbir and Katrina were finally ready to come clean about their relationship in the wake of some serious PDA

But once a Ranbir, always a Ranbir.

Katrina's co-star no more, Ranbir is completely besotted by the new lady. Guess Imran could take a leaf or two out of Ranbir's little black book. But he's a married man now!