Although she repeatedly denied there was anything between her and “Twilight” heartthrob Robert Pattinson, reports are coming in saying that he was precisely why Megan Fox decided to call the engagement off with longtime live-in boyfriend Brian Austin Green. However, in the meanwhile, Pattinson moved on to date Kristen Stewart, other reports say, so it seems things are not looking that good on a personal level for Megan.

According to an E! Online report, sparks flew the very moment Pattinson and Fox met. The two dated for a short while, during which time Megan started telling friends and anyone who would listen how she was completely head over heels with Robert. As a matter of fact, she was so smitten with the British hottie that she even decided to end things with her longtime boyfriend Brian Austin Green, presumably in the hope that what she had with Robert would turn into a more serious thing, the report says.

“A knowledgeable and well-established source who worked extensively on ‘Jennifer’s Body’ with Megan claims that M.F. was running her mouth about how she ‘hooked up’ with Robert Pattinson. Interpret that how you will. Supposedly, this was around the time Meg and Bri had called off their engagement.” E! writes. Moreover, the e-zine even has an insider to confirm the story. “Megan was totally into [Rob] and thought he was really cute. But nothing ever went further than one night they were together. He totally blew her off.” the tipster reveals to the mag.

When Pattinson was blowing Megan Fox off, he was reportedly starting to date “Twilight” co-star Kristen Stewart, with whom he has been linked in the media for many months now. Just the other day, Emma Watson, with whom Rob shared the screen in “Harry Potter,” was telling the media that she found him totally adorable, but would never dream to do anything in this sense since she knew almost for a fact that he was with Kristen. In doing so, Emma might have actually spilled the beans on Hollywood’s worst kept secret, several glossy magazines were pointing out yesterday.

“Oh god! He’s absolutely hot! He’s driving me crazy... But we’re just good friends and can be on the phone for hours, because I know that there’s something going on between him and Kristen Stewart. And I’m really happy that Rob became so popular on ‘Twilight.’ He’s so gorgeous.” Emma Watson was saying the other day.