Recent reports suggested that "The Hunger Games" star Liam, 26, recently reconciled with pop superstar Cyrus, 23, after they spent the holidays together in the actor's native Australia, reported Contactmusic.
"Not that I know of mate," he responded during a talk on Australian radio program when asked whether the former couple were back together again.
Chris went on to explain that though he is close with his brother, it is unlikely he would be in the know about the situation.
"I would find out through the press," he laughed and added, "I find out last most of the time."