We know their movies or dance along to their songs, but what goes on behind their red carpet personas is often a mystery... Celebrities also have private lives and this selection's dedicated to their brothers and sisters, whose photos often grace their social networks on April 10th when the US celebrates National Siblings Day!
Some brothers or sisters are equally famous, but a lot of celebrities' siblings prefer to shun the spotlight and lead more discreet lives!
1. Penelope Cruz with her sister Monica. They're both actors, but Monica's also a dancer
2. Emma Watson posing her brother, Alex
3. Elijah Wood and his little sister, Hannah
4. Chris Hemsworth beside brothers Liam and Luke
5. Antonia, Nicole Kidman's sister
6. Lady Gaga (Stefani Joanne Angelina Germanotta) photographed here with her sister, Natali Germanotta
7. Maisie Williams posing next to her brother
8. Brad Pitt and his brother, Doug
9. Here's Eddie Redmayne with Tom, his younger brother
10. Scarlett Johansson has a twin brother called Hunter