The "Thor: Ragnarok" star disputes report his brother and the pop star are "officially" married.
"They're not officially married," the Marvel star told SiriusXM's "Sway in the Morning" on Tuesday.
The inquiry into his little brother's love life came after Australian celebrity gossip publication Now to Love reported Monday that they "are officially husband and wife."
Citing "a close pal," the outlet reported Liam and Miley tied the knot while vacationing in Byron Bay over the holidays.
Whatever ceremony the couple may have had in Australia, it wasn't anything official, according to Chris, who apparently is always pestering Miley to sing for him.
"She's expected to put on show and bang a few songs out, but she never does," the action star added. "I am insisting constantly," he joked. "I'm like, 'When's the performance coming?' She's a lot of fun."
Chris Hemsworth returns to theaters this weekend in military drama "12 Strong."