Miley Cyrus Liam Hemsworth Break Up: New Boyfriend Cheats With ‘Wrecking Ball’ Star During Her Relationship? New Couple Rumored To Be Dating Since ‘Much Earlier’

Miley Cyrus and Rolling Stone photographer Theo Wenner, her new boyfriend, have been romantic for several months and have been together since her photo shoot with the magazine, leaving many wondering if she was cheating on her ex-fiancé Liam Hemsworth.

A source revealed the information to the Huffington Post.

"She's definitely dating him," a source told HollywoodLife.com.

"Miley talks about how hot Theo is and how nice he's been to her. She's definitely completely in lust with him."

Miley Cyrus' hit single "Wrecking Ball" has captured the attention of fans around the world, especially for its ominous references to her relationship with ex-fiancé Liam Hemsworth, but many are left wondering how far back she wrote the song.

Rumors suggest that the couple was split up for several months before it was announced and but the final straw in their relationship was when Liam Hemsworth was left mortified after Miley Cyrus' performance at the VMAs 2013.

"Miley and Liam were already pretty much broken up at that point, but when he saw her performance and the backlash it created, it was the nail in the coffin," a source exclusively told Radar.

"That was all he needed to finally break up with Miley once and for all. He was embarrassed, disgusted and mortified by her performance."

Liam Hemsworth's sister-in-law Elsa Pataky urged him to break up with Miley Cyrus for over a year, Radar Online also reports.