A presenter, or host (sometimes hostess, in feminine form), is a person or organization responsible for running an event. A museum or university, for example, may be the presenter or host of an exhibit. Likewise, a master of ceremonies (also MC, emcee, or host) is a person that hosts or presents a show. In films, a presenter (but not a host) is a usually well-known executive producer credited with introducing a film or filmmaker to a larger audience. In broadcast media, especially British, a presenter is the person who hosts, narrates, presents, or takes the main role in the program.

A television presenter is a person who introduces or hosts television programmes. Nowadays it is common for minor celebrities in other fields to take on this role, but there are also a number of people who have made their name solely within the field of presenting, particularly within children's television series to become a television personality.

Some presenters may double as an actor, model, singer, comedian etc. Others may be subject matter experts, such as scientists or politicians, serving as presenters for a programme about their field of expertise (for instance, David Attenborough). Some are celebrities who have made their name in one area, then leverage their fame to get involved in other areas. Examples of this latter group include British comedian Michael Palin who now presents programmes about travel (such as Around the World in 80 Days), and Alan Alda, who has presented Scientific American Frontiers for over a decade.

Michael Gerard "Mike" Tyson (born June 30, 1966) is a retired American professional boxer. Tyson is a former undisputed heavyweight champion of the world and holds the record as the youngest boxer to win the WBC, WBA and IBF heavyweight titles at 20 years, 4 months and 22 days old. Tyson won his first 19 professional bouts by knockout, with 12 of them occurring in the first round. He won the WBC title in 1986 after defeating Trevor Berbick by a TKO in the second round. In 1987, Tyson added the WBA and IBF titles after defeating James Smith and Tony Tucker. He was the first heavyweight boxer to simultaneously hold the WBA, WBC and IBF titles, and the only heavyweight to individually unify them.

In 1988, Tyson became the lineal champion when he knocked out Michael Spinks in the first 91 seconds of the fight. Tyson successfully defended the world heavyweight championship nine times, including victories over Larry Holmes and Frank Bruno. Tyson lost his titles to 42-to-1 underdog James "Buster" Douglas on February 11, 1990, in Tokyo, Japan, by a knockout in round 10. Tyson continued in his quest to regain the titles, defeating Donovan Ruddock twice in 1991. Tyson was then scheduled to take on the undisputed heavyweight champion Evander Holyfield but pulled out due to injury.

Davina Lucy Pascale McCall (born 16 October 1967) is an English television presenter, currently hosting Channel 4's game show Million Pound Drop Live and Sky1's reality talent show Got to Dance. She is best known as the presenter of reality series Big Brother during its run on Channel 4 between 1999 and 2010. Having fronted the shows weekly live eviction shows every summer since the beginning, she decided not to return as host after it was dropped by Channel 4 and relaunched by Channel 5 the following year.

After a difficult childhood, by her early twenties McCall had pursued various jobs including solo singer. Having recovered from a drug problem, she embarked on a career in television with a first job presenting for satellite music channel MTV in 1992. After further work on terrestrial channels she became a household name thanks to Big Brother, while also continuing to work with other hosting vehicles on various channels, from game shows to talent shows. From 2005 she has also been a regular co-presenter for the Comic Relief annual telethons.