Ranker.com users have decided who deserves the title of the most good-looking brother/sister of a star.
20. Kaley Cuoco and her sister, Briana
19. Taylor Swift and her brother, Austin
18. Zoe Saldana and her sister, Cisely
17. Darren Criss and his brother, Chuck
16. Scarlett Johansson and her brother, Hunter
15. Blake Lively and her brother, Eric
14. Shawn Ashmore and his brother, Aaron
13. Nicholas Hoult and his sister, Rosanna
12. Chris Evans and his brother, Scott
11. Dakota Fanning and her sister, Elle
10. Jemima Kirke and her sister, Lola
9. Penélope Cruz and her sister, Monica
8. Audrina Patridge and her sister, Casey
7. Karlie Kloss and her sister, Kimberly
6. Kate Hudson and her brother, Oliver
5. Dakota Johnson and her sister, Stella
4. Nikki Reed and her brother, Nathan
3. Maggie Gyllenhaal and her brother, Jake
2. Prince William and his brother, Prince Harry
1. Mary-Kate and Ashley Olsen and their sister, Elizabeth
Or it's because we're getting old... At least I feel old, when I see posts like this, where I think "I have no clue who half of them are and the other half looks so f@#king old..."