Michael Buffer (born November 2, 1944) is an American ring announcer (or "MC") for boxing, professional wrestling, and National Football League events. Pioneering a distinct announcing style in which he rolls certain letters and adds other inflections to a fighter’s name, and known for his trademarked catchphrase: "Let's get ready to rumble!", he was inducted into the International Sports Hall of Fame in 2019.

Buffer was born in Philadelphia, Pennsylvania on November 2, 1944. His father was enlisted in the United States Navy during World War II. Buffer's parents divorced when he was 11 months of age, and he was then raised by foster parents, a school bus driver and housewife, in Roslyn, Pennsylvania. He enlisted in the United States Army during the Vietnam War at age 20 and served until age 23. He held various jobs, including a car salesman, then began a modeling career at age 32 before becoming a ring announcer at age 38.

In 1982, Buffer began his career as a ring announcer. By 1983, he was announcing all boxing matches promoted by Bob Arum's Top Rank on ESPN, which gave him a national identity at a time when ring announcers were strictly locally hired talent. By 1984, Buffer developed the catchphrase "Let's get ready to rumble!" in his announcing, which gained enormous popularity. He began the process of obtaining a federal trademark for the phrase in the 1980s, acquiring it in 1992. Consequently, Buffer has earned in excess of $400 million with the license for his trademark.

In 1991, Buffer signed a deal with HBO and became a permanent ring announcer on World Championship Boxing and on occasion he would sub for Jimmy Lennon Jr. on rival network Showtime on Showtime Championship Boxing and Lennon would occasionally sub for Buffer on HBO as well.

In 2018, Buffer signed with DAZN to serve as the exclusive ring announcer for all of its boxing broadcasts, which include deals with Matchroom.

Buffer was formerly the exclusive ring announcer for World Championship Wrestling (WCW) main events featuring Hulk Hogan or other top WCW talent until 2001, when the organization folded. WCW's former parent company Time Warner owned through their pay-per-view subscription division HBO, which broadcast many matches from promoter Top Rank, of which Buffer is the lead ring announcer. The exclusivity of his contract with WCW prevented Buffer from announcing for other wrestling-type organizations, forcing him to stop announcing for the UFC (his only UFC cards were UFC 6 and UFC 7). However, when WCW ceased to exist, and Time Warner had no more affiliation with professional wrestling, Buffer was enabled to announce in other wrestling promotions. During the Monday Night War, while Buffer was on WCW Monday Nitro, WWF wrestler Triple H created the phrase "Let's get ready to suck it!" to mock him, as part of his D-Generation X gimmick.

On Saturday Night's Main Event XXXV, for the first time in more than six years, Buffer returned to pro-wrestling ring announcing duties at Madison Square Garden in a boxing match between pro boxer Evander Holyfield (who was substituting for Montel Vontavious Porter) and pro wrestler Matt Hardy. Buffer appears in the Royal Rumble 2008 advertisement, in which he begins to say "Let's get ready to rumble!" only to be superkicked by Shawn Michaels, causing him to fall over. As well as being in the commercial for the event, he was the guest ring announcer during the Royal Rumble match itself.

During his career, Buffer has announced the MLB World Series, the Stanley Cup Final, NBA Finals, the Volunteer 500 at Bristol Motor Speedway, and NFL playoff games. He was a guest announcer at the 1999 Indianapolis 500 and the 2017 United States Grand Prix.