MACAULAY CULKIN’s EX- GF MILA KUNIS begs him to get help, sources say!

WITH Macaulay Culkin’s tragic downward spiral continuing, his long-time ex Mila Kunis is begging the “Home Alone” star to get help, sources say.

As The ENQUIRER has reported, eyewitnesses claim Culkin is hope­lessly hooked on heroin. And close pals say Mila – who dated the trou­bled actor for eight years and is now seeing Ashton Kutcher – made a per­sonal plea for Culkin to check into rehab.

“Ashton convinced Mila to call Mac during their getaway in Bali,” a source close to the “Ted” hottie told The ENQUIRER.

“So Mila had an assistant track him down on the phone. When she final­ly heard Mac’s voice, she burst into tears.”

The “Black Swan” beauty, 29, “poured out her heart” to Culkin, 32, over her wor­ries about him, said the insider.

“Then Mila begged Mac to seek treatment at rehab,” the insider continued.

“She desperately tried to make him understand that it was not too late for him to get well.”

BUT Culkin – who played a drugaddled club promoter in the 2003 drama “Party Monster” – ignored her pleas, said another source.

“While Mila was going on about how a long, intensive stint in rehab would help get his career back on track, Mac played dumb,” the second source told The ENQUIRER.

“He kept saying, ‘I don’t know what you’re talking about, Mila. I’m doing great.’”

As The ENQUIRER has reported, sources say Culkin has shot up her­oin and the powerful prescription painkiller oxycodone, and nearly ovwerdosed several months ago.

 He’s also spent up to $6,000 a month on the dangerous pain­killers Percocet and Vicodin, added the sources.

On Aug. 3, just days after The ENQUIRER’s shock­ing report on his addiction, Culkin was photographed vomiting into bushes outside the Chateau Marmont hotel in Hollywood.

Sadly, it was Culkin’s partying that prompted Mila to dump him in 2010, sources say.

“Mila knew that Mac was a mess after their breakup, but she had no idea his drug use was so severe,” noted the insider. “She’s praying that he gets help before it’s too late.”

The second source added: “Mila couldn’t have imagined how low Mac had really sunk. She thought he was partying and drinking, maybe smok­ing pot – but nothing more. The reports about heroin abuse freaked Mila out.

“Now she has her fingers crossed that Mac will follow her advice and get help. She’s petrified of get­ting the news that Mac has overdosed again or, worse yet, died.”