Four-year-old Delilah O'Donoghue became an overnight star, after her dad Lee posted a video on YouTube of her telling off little brother Gabriel.
Two-year-old Gabriel had spat at an older boy, and the video shows him being reprimanded by Delilah for his behaviour. The sisterly advice was recorded on dad Lee's phone. He only uploaded it to YouTube because the computer file was too big to send to his wife Alex.
As it stands, the video, entitled You Need To Toughen Up A Bit, has had over three-million hits on YouTube, so we thought it was about time we met its stars Delilah and Gabriel.