US president Barack Obama was among  the high-profile guests David Letterman had on his show throughout the years. Recently, a parade of celebrities including Tom Hanks, Julia Roberts and George Clooney paid their respects to the talk-show host. Photograph: Jim Watson/AFP/Getty Images

“You know what I’m going to devote the rest of my life to?” David Letterman said on his last night as the host of Late Show on CBS. “Social media.” Le(...)

Brian Williams moderating a presidential debate  in Florida  in January 2012. Williams said on Saturday he was stepping aside from daily news broadcasts for several days after admitting he had misled the public about being on a helicopter that was forced down in Iraq in 2003. Photograph: Chip Litherland/The New York Times

This was a bomb that had been ticking for a while. NBC executives were warned a year ago that Brian Williams was constantly inflating his biography. T(...)

Trevor Noah: a firm believer in the dictum that a comedian’s first and last purpose is to make people laugh and not be a hectoring, socially relevant buzz-kill

‘I was born a crime,”says the fast rising South African comic Trevor Noah. The personable 30-year-old means it literally. Born to a black South Afr(...)

Comedian Jay Leno speaks during a rally protesting against Brunei’s new strict sharia law penal code outside the Beverly Hills Hotel, which is owned by the Sultan of Brunei, in Beverly Hills, California. Photograph: Reuters

Beverly Hills City Council has joined celebrities including comedians Ellen DeGeneres and Jay Leno in a public campaign against the Sultan of Brunei o(...)

We can’t get the Tonight Show in Ireland (unless you have CNBC and are prepared to stay up late). Boo! But the show’s official YouTube channel has lot(...)

Comedian Stephen Colbert, who describes himself as “an omnivore,” who loves everything from ‘A Man for All Seasons’ to ‘Jackass’. Photograph: Reuters/Jim Bourg

I don’t remember much about being on Stephen Colbert’s show. It all passed in a blur of fear. I remember him coming into the make-up room to remind(...)

David Letterman waves to his audience after announcing that he intends to retire in 2015. Photograph: Jeffrey Neira/CBS

David Letterman will retire next year ending the longest career in American late-night television hosting and sparking (...)

RTÉ director-general Noel Curran, pictured in the RTÉ Digital area of its Montrose base in Dublin. Photograph: Bryan O’Brien/THE IRISH TIMES

RTÉ has called for a relaxation of Ireland’s “restrictive” defamation law. Director-general Noel Curran said the broadcaster was bound by “strict a(...)

Actor Will Smith appears with host Jimmy Fallon on the first edition of NBC’s revamped Tonight Show. Photograph: Theo Wargo/Getty Images

A performance by U2 against a shimmering Manhattan sunset on the roof of NBC’s 30 Roc(...)

Host Jay Leno with actor Billy Crystal during a commercial break while taping the last episode of “The Tonight Show with Jay Leno” in Burbank, California. Photograph: Mario Anzuoni/Reuters

Johnny Carson’s departure from “The Tonight Show” was an abdication. Jay Leno’s last show, on Thursday, was closer to a retirement party - a bitterswe(...)