Real Love Or Bullocks?

Film stars Hugh Grant and Sandra Bullock braved the wintery weather to attend the premiere of their new movie, but the atmosphere was anything but icy.

The pair, who arrived together for the screening of Two Weeks Notice, flirted and joked their way through the evening, with Grant planting a huge kiss on Bullock's cheek.

At one point Bullock even reached out playfully to pinch her co-star's bottom as they posed on the red carpet.

They kept everybody guessing about whether their on-screen affair had blossomed into a real-life romance.

Rumours have it that the pair enjoyed more than just a working relationship while filming the romantic comedy, but both stars have laughed off the idea.

Grant, 42, said he would love to make another film with Bullock.

The Four Weddings and a Funeral star added; "I have never had so much fun making a film before.

Hundreds of film fans greeted the actors with screams and cheers on their arrival in London's Leicester Square and were rewarded when the pair spent 20 minutes signing autographs, chatting and stopping to have their photos taken with the crowds.

In Two Weeks Notice Bullock plays a neurotic lawyer who is hired by Grant's Billionaire property tycoon, and following the well worn formula of romantic comedies the couple start off loathing each other but soon find themselves falling in love.