'Peanut butter baby' is a timeless reminder to check on your kids when they're being too quiet. Photo / YouTube

Despite being over a decade old, this cute video of a sister's peanut butter prank has gone viral.

Mum-of-six Gina Gardner Brown originally filmed the video in 2004 and posted it on Facebook in 2009, but after she commented on the video again recently, it started to go viral.

The video shows her then three-year-old daughter Emily caught after covering her 18-month-old brother Ethan in peanut butter.

The hilarious clip is a timeless reminder to check up on kids when they get too quiet.

When asked by her mother what she was doing, the toddler replies, "I don't know, I was just scrubbing him."

"I knew you two must be getting into something, but I just didn't imagine that it would be this," Brown replied, while baby Ethan chortles through the mess.

The video originally won them an all-expenses trip to Chicago when it appeared on a TV show called 30 Seconds of Fame. Since it was posted on Facebook, it's gone on to be shared over 700,000 times - extending the family's 30 seconds out a bit longer.

- nzherald.co.nz