However, not many know that he has officially changed his name, and the news has left the internet laughing.
One jokes: “If it’s not Kevin McCallister my opinion of him has just plummeted!”
“Great, now that I finally learned how to pronounce it!” laughs another.
“Thought he’d have changed it to McLovin. Missed opportunity there,” offers a third.
This isn’t the first time Macaulay Culkin has surprised his fans, though.
In fact, not many people knew that he is engaged to a fellow former child star!
Culkin is in a relationship with Brenda Song, a household name thanks to her role as the wealthy and lovable London Tipton in the Disney Channel series The Suite Life of Zack & Cody.
“I was today years old when I found out Brenda Song and Macaulay Culkin are together,” one person pens.
A second agrees: “Today was the day that I learned Macaulay Culkin and Brenda Song are together and have a baby.”
A third person added: “Sooooo. Am I the only one who didn’t know Macaulay Culkin and Brenda Song are a thing?!?!?!!”
The pair first started dating while filming Seth Green’s comedy-drama Changeland in 2017.
They even share two sons: Dakota, born in 2021, and another, whom they welcomed less than two years later, whose name has been kept under wraps.
The couple have largely kept their relationship private on social media, but the details they have shared have got fans’ hearts fluttering.
But now, it’s the actor’s name that’s in the headlines…
Culkin was given the middle name Carson at birth, reportedly after Kit Carson, an American frontiersman from the Old West.
That’s now changed, though, as he held a poll on his website allowing fans to pick his new moniker.
He wrote: “My middle name is something dumb. Larry? Orange? Honestly, I can’t even remember it.
“So I asked you all to send in some better options so I can go down to the courthouse and explain to a judge why I need to change my middle name to something cool.
“You sent in hundreds of suggestions and after going through them all, these were my favorite five.”
As the poll neared its conclusion, he wrote: “Sure, I might have a gold-plated watercraft and chrome-plated invisibility cloaks, but all I want for Christmas is a new middle name.
“And then you can be all, ‘Oh, you got your wife a beautiful portrait of your family? Well, I chose Macaulay Culkin’s middle name.’
“And they will cry and cry. Don’t be the kind of person who cries on Christmas.
“Be the kind person that chooses my new middle name.”
Reacting to the name change, one fan wrote on X, formerly Twitter: “[This] is why you never ask the internet for their opinion on naming things.
“It always ends up being the most ridiculous thing ever. Just ask Boaty McBoatface.”
Boaty McBoatface was the winning name in a 2016 public poll to name a UK polar research vessel.
Though the name went viral, the ship was ultimately named RRS Sir David Attenborough, while ‘Boaty McBoatface’ was given to a smaller submersible.
The event became a warning against internet culture influencing public decisions.
The names Culkin picked out for his poll were Macaulay Culkin, Shark Week, Kieran, TheMcRibIsBack, and Publicity Stunt.
After more than 100,000 votes, Macaulay Culkin was the overwhelming winner with more than 61,000 votes.
So, his official name is now Macaulay Macaulay Culkin Culkin.
Weird, sure, but better than a tribute to McDonald’s ever-popular barbecue pork sandwich.
One fan said: “I was today years old when I found out that Macaulay Culkin’s middle name is legally Macaulay Culkin.”
Another penned: “So his whole name is now Macaulay Macaulay Culkin Culkin and this somehow makes me extremely happy.”
Another joked: “Damn. I was pulling for Camaulay Mulkin. Macaulay Camaulay Mulkin Culkin.”
One fan liked his name as it was, though: “Macaulay Carson Culkin has a wonderful ring to it.”