Jeffrey Warren "Jeff" Daniels (born February 19, 1955) is an American actor, musician and playwright who portrayed Roger Dearly in the 1996 Disney live-action remake of 101 Dalmatians as well as Dr. Ross Jennings in the 1990 thriller Arachnophobia. and Tim O'Hara in the 1999 Disney science fiction comedy film My Favorite Martian.