Roy Williams was an artist and entertainer for The Walt Disney Studios, perhaps best known as "Big Roy," the adult mousekateer for four seasons on the Mickey Mouse Club television series.

Williams was born in Colville, Washington on July 30, 1907 and was raised in Los Angeles, where he attended Fremont High School.  After graduating, he was hired as an artist by Walt Disney in 1930.  He worked on animated shorts while attending Chouinard Art Institute at night.  He later also developed story ideas for Disney.  He also designed over 100 insignias for the U.S. armed forces during World War II, and is credited with designing the mouse ears worn on the Mickey Mouse Club.

Disney director Jack Kinney hugely admired Williams' prolific talent, saying that he could "sit down and grunt out a few pounds of gags as if it were nothing".

The Mouseketeers who worked with him on the original Mickey Mouse Club series remembered him fondly.  Former Mouseketeer Lonnie Burr, appearing on Tom Snyder's Tomorrow show on NBC in 1975 to talk about the Mickey Mouse Club at the time of its 20th anniversary, called Williams "a warm guy, who liked kids, always had time for kids, and always helped us any way he could."

Williams also produced one-panel gag cartoons for The New Yorker, Saturday Evening Post, and other magazines.

Williams died in Burbank, California on November 7, 1976.  He was posthumously inducted as a Disney Legend in 1992.

Joseph Roy Williams was born in Colville, Washington on July 30, 1907. Roy Williams was hired by the Hyperion Studio in 1925 by Walt Disney who paid for his training at the Chouinard Art Institute.  This began a lifelong association with Disney Studios, first in the art department and later in the animation department.  For many years he was co-host for the Mickey Mouse Club.  He retired from shortly before his death on November 7, 1976.