National Sibling Day

'Big sisters rule': Eva Mendes sports a mullet in throwback snap as she leads the celebrities celebrating National Sibling Day

It is an annual American holiday created to recognise the relationship of siblings.

And celebrities flocked to social media on April 10 to show some digital love to their brothers and sisters.

Actress Eva Mendes led the pack as she treated fans to an amazing flashback snap of herself and her sisters.