Which celebrity is the youngest Ashton Kutcher Queen Latifah Adam Brody Nicole Richie?

The youngest celebrity in that list is Adam Brody.

Here's a breakdown of their birth years:

* Adam Brody: December 12, 1979

* Ashton Kutcher: February 7, 1978

* Queen Latifah: March 18, 1970

* Nicole Richie: September 21, 1981