The 'Wrecking Ball' singer, who was first linked to the star following her split from fiance Liam Hemsworth in September 2013, is said to have been secretly dating him for nine months, reported Daily Mirror.
"Their romance is getting pretty serious and all of her friends are believed to have known about it for a while. We're not sure how she's kept this one under wraps, but we want Miley to get back on the relationship bandwagon. She's started hanging out with her animals too much," a source said.
"Tish says he's part of the family," the source added.