"Everybody in her circle knows they've been together this whole time," a source close to the "Wrecking Ball" singer tells Us. Cyrus, 21, first started seeing the producer, 25, soon after splitting from her fiance Liam Hemsworth in September 2013.
Another insider tells Us the duo have become "pretty serious." The "23" hitmaker has even won over Cyrus' mom, Tish Cyrus. "Tish says he's part of the family," the insider tells Us.
Since being on her Bangerz tour, Cyrus has made a point to meet up with Mike Will Made-It. Despite not always being in the same city, the couple make sure to "talk and text all day, every day," the Cyrus source says.
A witness tells Us the twosome were "all over each other" at a BET Awards bash on June 28. Not to mention, Us Weekly exclusively learned back in October 2013 that Cyrus spent a majority of her album release party "grinding all over [Mike Will Made-It], kissing his neck."