The showbiz couple, who have been dogged by suggestions their union is close to breaking up for some time, have called it quits. A source told the Sunday Mirror newspaper: "Justin truly thought he'd found the one in Jessica and she felt the same. But the relationship just didn't seem to go anywhere.
"They've both been working incredibly hard and will remain friendly - but there's no more romance. "It was mutual and they agreed it was best to part ways if things weren't going to head towards marriage and kids. They are both incredibly busy.
"They both knew things were going to end for ages - it was just a matter of when." Justin is currently filming new comedy movie 'Bad Teacher' with his ex-girlfriend Cameron Diaz, and the pair have been enjoying their time together, sharing jokes and getting on better than ever.
The source added: "Cameron was the one who got Justin into the film. She wanted him from the start. "There's even been steamy love scenes and lots of kissing included in the script. They're having a blast together."Justin's music career has taken a back seat to acting recently, and he has also filmed the role of Boo-Boo in a new big-screen adaptation of 'Yogi Bear'
The film's director Eric Brevig recently admitted Justin has "nailed" the role. He said: "We heard that he wanted to do the voice, and I thought, 'Oh, great,' because everybody thinks they can do Yogi and Boo-Boo. "But when we met with him for the first time, he did the tiniest little amount and it was like, 'This guy has got it nailed!' "
Kristen Stewart has admitted she loves Robert Pattinson. The 20-year-old actress - who stars alongside the British heartthrob in 'The Twilight Saga' movies - said she feels strongly for her co-star because he has a childish side. She said: "I love Rob because he always wants to be the best.
He can be very childish. When Rob does something right or wins something he talks with a different, little voice - like a five-year-old. "Rob is sexy, in a tortured artist way. This might be because he is British. He's tall, looks like he is thinking all the time and is incredibly funny.
"I love the way he sings. It breaks my heart. And don't you think he's just gorgeous? Rob's also a very bad liar, he just can't do it!" The American star also claims Robert once proposed to her for a joke. She told the News of the World newspaper: "He asked me to marry him. As a joke, though. Well at least I think so."
The couple have been rumoured to be in a relationship since they first met on the set of the vampire movies, but have never officially been seen together, despite rumours they were going to reveal their status at this year's BAFTA Awards. Speaking at London's Grosvenor House Hotel at a post-BAFTAs dinner this year, Robert said: "It is extremely difficult but we are together, yes. We can't arrive at the same time because of the fans, it goes crazy."