While Mike Will Made It and Miley Cyrus have had a public working relationship for quite some time, most thought their relationship ended there. However, several sources are revealing that the "23" collaborators have been more than friends for almost a year.

According to Us Weekly, Cyrus and Mike Will began dating shortly after her split from fiance Liam Hemsworth in September 2013. "Everyone in her circle knows they've been together this whole time," a source close to Miley revealed to the magazine.

Another insider claims the two have become "pretty serious" over the last 9 months, with Mike Will even winning over Cyrus' mom, who now considers him a part of the family. While on tour, the couple make it a point to meet up whenever possible, and when they can't they "talk and text all day, every day."

The witness also told the mag that the duo were inseparable during the BET Awards weekend in LA and it was reported by Us Weekly back in October that Miley "grinded all over" Mike Will at her album release party, and was spotted kissing his neck throughout the night.

Check out flicks of the alleged couple above. 

Source: Us Weekly