Some of these are pretty scary, like the Heder brothers. Plus I don't know which London brother is the actor. Check out these 10 celebrities and their twin siblings!

1. Michael and Ashton Kutcher

2. Hunter and Scarlett Johanson 

3. Vin and Paul Diesel

 4. Jon and Daniel Heder

5. Patricia and Gisele Bundchen

6. John and Jana Elway

7. Marissa and Giovanni Ribisi

8. Alanis and Wade Morisette

 9. Jason and Jeremy London

 10. Keifer and Rachel Sutherland