Arthur Steven Lange, Jr., (born October 11, 1967 in Union, New Jersey), is an American stand-up comedian, radio personality, and actor. Lange is most notable for replacing Jackie Martling on The Howard Stern Show, and as a member of the original cast of the sketch comedy series MADtv.

The Howard Stern Show

Comedian Norm MacDonald offered him a part in the 1998 movie Dirty Work. While promoting the movie, McDonald brought Lange to The Howard Stern Show. Lange appeared on the show several times after, and was eventually asked to take over Jackie Martling's chair when Martling left the Stern Show in 2001.

Since Lange joined the show, Stern has often teased him for his eating habits, his role in the poorly-received movie Dirty Work, and his lack of professionalism. Stern also makes a point to praise Lange's comedic talents. Stern and his staff have commented that Lange's life is a sort of perpetual adolescence; his mother delivers food parcels and cleans his apartment, he continually gorges himself on pizza and other fattening foods, and his past drunken binges are legendary among Stern fans.

In the days leading up to Stern's departure from terrestrial radio, Lange revealed that he and Gary Dell'Abate were approached by Infinity Broadcasting about replacing him on terrestrial radio with their own show. Lange claimed he was offered roughly $5 million to defect, but he and Dell'Abate claimed to have never given the offer much thought.

Lange is known for doing many impressions on the show, among them are Rush Limbaugh, Ted Kennedy, Iron Sheik, Eric the Midget, Don Rickles, Katt Williams, Johnny Fratto, Jeff the Drunk, Harry Caray, Brian Johnson, Mark the Bagger, Elliot Offen, Bigfoot, Crazy Alice, Henry Hill, Bubba the Love Sponge, The Notorious B.I.G. and others.

Due to his fame as Howard Stern's sidekick, Lange was invited by Playboy to be part of a special photoshoot as one of the Cyber Club's celebrity photographers. He chose Miss November 2001 Lindsey Vuolo as his model for the pictorial.