Hilarious reaction of a 4-year-old girl when she realises there is going to be a baby boy in the house.

Lana was delighted when she found out her parents were having another baby. However, she got very disappointed at the cake eating gender reveal.

The footage shows Lana bursting into tears after seeing the colour blue inside a cupcake.

"I want a girl,'' she cries out loud.

The footage was filmed on March 3 in Connecticut but has recently emerged online.