Macaulay Culkin vows to 'protect' Brenda Song in Trace Cyrus feud

Macaulay Culkin has issued a major threat to long-term girlfriend Brenda Song’s ex boyfriend Trace Cyrus who recently launched a social media rant against her.

The 44-year-old actor has decided to take the matter to court in order to protect the Disney alum’s, 37, safety and reputation who is reportedly disturbed because of Cyrus.

The Home Alone star has sent a pointed message to the rocker, 36, to stop spreading lies about his girlfriend, after he accused her of faking a cancer diagnosis, an abortion, multiple pregnancies, and stealing thousands of dollars from him during their seven year relationship in the past, as per RadarOnline.

An insider close to Culkin told the outlet, "That is a very emotional spot, and he is going to go to the ends of the earth to protect his fiancée and kids. He's being protective.”

The source continued, "He's absolutely sickened by what Trace has said about Song. He knows it's not true. He'd love to punch his lights out, but Song has begged him to let it slip with a warning so it doesn't cause even more heat to resurface these vile accusations."

Speaking how Song is affected by the drama, they added, "She's barely sleeping, and it's affected their whole routine. He's heartbroken for her – and Culkin has vowed to protect her no matter what it takes."