Reports have it that Liam Hemsworth is allegedly cheating on fiancé Miley Cyrus with a mysterious but very sexy brunette.

Things seem to be going from bad to worse between Liam Hemsworth and Miley Cyrus. The couple drew much attention last year when they announced their sudden engagement. Many people criticized them for being too young.  Soon after the engagement, rumors of trouble brewing in the lovers' paradise started making the rounds.  First, Cyrus was caught up in a string of absurd acts like going from blonde to platinum and then chopping her hair off. This was followed by really peculiar twitter messages that left people wondering what had happened to their favorite "Disney" star. At one point in time, reports also had it that Hemsworth had threatened to break all ties with Cyrus if she didn't stop her weird Twitter activities.

More trouble started when Hemsworth was recently accused of sexting January Jones and expressing his desire to bed the "Mad Men" actress. Of course, the actor's rep denied all such rumors and slammed the media for spreading false information.

Hardly had smoke from this rumor dispersed then another one was stoked. The latest is that Hemsworth cheated on Cyrus with a mysterious but very sexy brunette. If rumors are to be believed, the "Hunger Games" actor was seen indulging in more than just flirting at a Toronto bar while Cyrus was away in Europe. What added fuel to the fire were reports that suggested the mysterious woman and Hemsworth left the bar together after displaying some major PDA the entire night at the club.

These rumors too were also denied by Hemsworth's rep who told Page Six that there was no truth in this rumor too.

"It's sad that these rumors won't go away because their foundation is already so shaky," a source close to Miley told HollywoodLife.com exclusively. "She wants to believe that Liam's not cheating on her but they spend so much time apart and fight so much it's hard for her to know what to believe."

Will this early engagement finally end with marriage? Only time will let. For now, let us know what you think about Liam Hemsworth and Miley Cyrus' relationship.