Jon Wellner is an American actor best known for his recurring role as toxicology expert Henry Andrews on the police procedural television series CSI: Crime Scene Investigation, since 2005.
Wellner's television credits include Becker, Gilmore Girls, Yes, Dear, Judging Amy, N.C.I.S., That's So Raven, Bones and more. In 2002, he played Gilligan in the movie of the week, Surviving Gilligan's Island.
Jon is also a standup comic and improviser. Theatre credits include Morningstar at the famed Steppenwolf Theater in Chicago. Film credits include Bruce Almighty and Ocean's 13.
Jon is from Chicago and his birth date is July 11.
Jon suffers from Retinitis Pigmentosa and actively works with Foundation Fighting Blindness, an organization that drives research for the prevention, treatment and cure of all retinal degenerative diseases.