Hillis graduated from Newton South High School.
He picked up his unusual nickname "Rib" while in the third grade playing with frogs, and enjoyed the sounds that they make. Hillis married Melissa Blackler four days after their first date but separated in 2008. They have twins Dane and Hannah Hillis.
Modeling During his junior year at the University of Colorado in Boulder, he was discovered by a modeling agent.
Since college, he"s been a much sought-after model, working in Milan, Paris, Barcelona, London, Sydney, New York, Miami and Los Angeles for such publications as Uomo Vogue, Gentlemen’s Quarterly, Esquire and Men"s Health, as well as countless national and international commercials. In addition, he landed various print campaigns for Versace, Armani and Catalyst Cologne.
He appeared on an episode of America"s Next Top Model, Cycle 4 in 2005 as a lingerie model in the episode "The Girl Who Pushes Tyra Over The Edge". Acting Returned to the United States. in spring of 1996, Hillis moved to Los Angeles and landed a role on an episode of Baywatch Nights as Jeds.
His most notable role as an actor came in 1997 on General Hospital"s spin-off Portuguese Charles as Doctor Jake Marshak.
He was on the show from 1997–1998 and in May 2006, he substituted for Eric Martsolf as Ethan Winthrop on Passions when Martsolf took paternity leave for his newborn twin sons. Moreover, he has appeared in dozens of television shows such as Ugly Betty, Computer Society of India and Computer Society of India: Miami. He also has a starring role in the feature film Propiedad Ajena.