I don’t think there are that many redheaded celebrities.  I can think of Debra Messing right away because she is so funny and very beautiful.  Lindsay Lohan,  Geri Halliwell, and Marcia Cross, are redheads. Reba McIntyre, Julia Roberts, Kelly Preston, Kate Winslet and Kelly Martin are all the females I can think of, who have natural red hair.   Among the guy celebrities who I think are all red heads are: Conan O’Brien, Ron Howard, David Caruso, Bobie Flay, Mario Batalli (Multo Mario), Ted Koppel and Alan Rickman, who plays such a great bad guy in so many films.  The guy who sings the lead for the band “Green Day” has red hair (but is it real) Billy Joe Armstrong, is the only other guy I can think of, for this list.