Bill Hader and Conan got together to review "God of War," though they may have spent more time ad-libbing than playing the game.
The two former co-stars reminisced about filming the 1994 comedy and shared the secret to their chemistry.
Some of Conan's silly shenanigans included drawing a large penis on himself in a drawing class and playing farting sounds on a portable speaker.
Sean Penn slams Steve Bannon repeatedly on "Conan." Long before Bannon was fired from the White House, he was an executive producer on Sean Penn's 1991 film "The Indian Runner."
Late night hosts had a lot to say about the president's abrupt firing of Secretary of State Rex Tillerson via Twitter on Tuesday.
Kevin Hart gives a play-by-play of his viral drunken moment following the Super Bowl. He framed the turf he pulled from the field and called it "Kevin's Stupid Day."
A closer look at how Jimmy Kimmel, Stephen Colbert, Trevor Noah, and Conan O'Brien responded after President Trump's State of the Union address.
Susan Sarandon came out during Nathan Fielder's interview as his "backup guest" on "Conan." She sat next to him and didn't say a word the entire time she was on the couch.
Aaron Rodgers visited "Conan" to play the new "Assassin's Creed" video game, but the host was only interested in making Aaron relive his recent injury.
Weird Al took a break from living in an "Amish Paradise" to swing by "Conan." And while he was there they talked about the "Walking Dead" Season 8 premiere. Weird Al's song, "Another One Rides the Bus," was featured in a recurring dream sequence during the premiere.
On “Conan,” Billy Eichner recalled seeing a lonely former White House press secretary Sean Spicer in the green room backstage at the Emmys. According to Eichner, the only person who would speak to Spicer was the star of "Young Sheldon" — 9-year-old Iain Armitage.
Late-night hosts — from Stephen Colbert to James Corden — were unified in their call for some type of gun control legislation in the wake of the horrific Las Vegas shooting.
"Rogue One" star Diego Luna visited Conan where he shared a firsthand account of the terrible destruction from the recent 7.1-magnitude earthquake that struck Mexico City.
Conan O’Brien aired a preview of his upcoming "Conan Without Borders: Israel" episode, which airs Sept. 19 at 10 p.m.