Have you ever wondered how US President Barack Obama looked when he was just a tiny toddler? Or how about basketball sensation Jeremy Lin sitting on his grandmother's lap?

While some look similar, others are almost unrecognisable - guaranteed to shock you with how cute they looked, or with their goofy retro hairstyles and awkward smiles.

Check out some of the biggest names today and how they looked when they were young.

Click on thumbnail to view (Photos: Reuters, Internet)