Conan O’Brien and Denis Leary
Conan O’Brien is the hilarious late night talk show host with an infectious laugh and his trademark ginger hair. It turns out that crude standup comic and actor Dennis Leary is his third cousin by marriage.
As red-headed funny men who both hail from Boston with American-Irish heritage, it is a little more obvious that they are related. The two often refer to one another as “cuz” when they cross paths on talk shows and at events.