'Should have heeded his advice': Charlie Sheen says Trump was right about doomed marriage

President Donald Trump makes a surprising cameo in the new Netflix documentary "aka Charlie Sheen," and the controversial actor told Fox News Digital that not only did he not know the president was in the film, but that he offered some savvy advice.

Sheen, who declared himself a "Constitutional Republican" in 2015 and whose famous father Martin is a well-known, active Democrat who has been vocal against Trump, told Fox he was amused by Trump's appearance in which he encouraged Sheen's in-laws to get involved in his troubled marriage to Brooke Mueller in a 2011 ABC interview.

"It was a trip. I didn’t know Trump was in the [Netflix] doc," Sheen told Fox News Digital. "I saw it and I called the director. I was like, ‘That’s the coolest thing ever.’ I was like, ‘Whoa!’ And newsflash – they should have heeded his advice."

Sheen's tumultuous marriage to Mueller ended in 2011 following a domestic violence incident and was marked by both of their struggles with substance abuse.

"I remember the night that nine years of no crack came to a tumbling, spectacular close," Sheen recalls in the film. "She's in the bathroom with this girl and I can hear them doing blow and I start banging on the door, and I said, ‘If you’re going to do this s—— in my house, you need to stop wasting it, and you need to do it properly. Let me show you how to cook this s—— up.' And it was on."

No stranger to alleged affairs and failed marriages, and currently on his third wife, Trump said he tried to intervene in Sheen's marriage, offering Mueller's parents some advice on the thrice-divorced troubled actor.

"Brooke is from Palm Beach, and I told the parents, ‘Don't let your daughter marry him. I think he's wonderful, but he's a disaster. Don't let your daughter marry him,’" said Trump in the 2011 ABC interview.