Up until the 1970s, it was common practice to see photographs in a black-and-white form. While pictures became a staple decades long before in an effort to keep track of precious memories, there always seemed to be something missing: color.

Fast-forward to the present, we are now able to colorize even the world's most iconic snapshots with the help of modern day technology.

Below are some of the world's most famous faces in historic photographs, finally shown in a colorized format.

1. Pablo Picasso (date unknown)

2. Albert Einstein (1939)

3. Elizabeth Taylor (1956)

4. Nikola Tesla (1893)

5. Joan Crawford (1932)

6. Henry Ford (1919)

7. Clint Eastwood (1962)

8. Charlie Chaplin and Helen Keller (1918)

9.  John F. Kennedy (1947)

10. Marilyn Monroe (date unknown)

11. Martin Luther King Jr. and Sammy Davis Jr. (1965)

12. Mark Twain (1990)

13. Young Princess Diana (1972)

14. Walt Whitman (1868)

15. Theodore Roosevelt (1916)

What black-and-white photo would you like to see colorized?