But while we all have our own favourite moments and unforgettable bits from each one, of the Home Alone stars struggled to say one line to Macaulay Culkin as it was so ‘horrific’. Catherine O’Hara played the mum, Kate McCallister in the 90s classic and reunited with the once child star who played the lead, Kevin, last December.

Now, Home Alone fans are only just realising Culkin's younger brother, Kieran, was also in the film too. That’s right, so the next time you pop on the holiday classic on, take a look at Kieran in his first on-screen role.

Macaulay Culkin's role as Kevin McCallister in the Home Alone franchise made him as the highest-paid child actor of his time.

Kieran Culkin starred in the 1990 Christmas classic alongside his brother Macaulay - but he had no idea he was in the movie until he saw it at the premiere