Conan Christopher O'Brien (born April 18, 1963) is an American television host, comedian, writer, actor, and podcaster. He hosted several late-night talk shows, beginning with Late Night with Conan O'Brien (1993–2009) and The Tonight Show with Conan O'Brien (2009–2010) on the NBC television network, and Conan (2010–2021) on the cable channel TBS. Before his hosting career, O'Brien was a writer for the NBC sketch comedy series Saturday Night Live from 1988 to 1991, and the Fox animated sitcom The Simpsons from 1991 to 1993. He has hosted the podcast series Conan O'Brien Needs a Friend since 2018, and starred in the travel show Conan O'Brien Must Go on HBO Max since 2024. Born in Boston, Massachusetts, O'Brien was raised in an Irish Catholic family. He served as president of The Harvard Lampoon while attending Harvard University, where he graduated with a degree in history and literature. He was a writer for the sketch comedy series Not Necessarily the News. After writing for several comedy shows in Los Angeles, he joined the writing staff of Saturday Night Live. O'Brien was a writer and producer for The Simpsons for two seasons until he was selected by Lorne Michaels and NBC to take over David Letterman's position as host of Late Night in 1993. Despite unfavorable reviews and threats of cancellation in the show's first years, O'Brien and the show developed and became highly regarded, earning a Primetime Emmy Award. He hosted Late Night for 16 years, and as of 2025 is still the longest-serving host in the history of the franchise. In 2009, O'Brien moved from New York to Los Angeles to host his own incarnation of The Tonight Show for seven months until highly publicized network politics prompted a host change in 2010. After this departure, O'Brien hosted a 32-city live comedy tour titled The Legally Prohibited from Being Funny on Television Tour, which was the subject of the documentary Conan O'Brien Can't Stop (2011). He then hosted Conan from 2010 to 2021. Throughout his career, he has also hosted a number of awards shows and television specials, including the Emmy Awards in 2002 and 2006, the White House Correspondents' Dinner in 1995 and 2013, and the Academy Awards in 2025, 2026, and 2027. O'Brien was named one of Time's 100 Most Influential People in 2010, and was inducted into the Television Academy Hall of Fame in 2025. He is the 2025 recipient of the Mark Twain Prize for American Humor. Known for his spontaneous hosting style, which has been characterized by The New York Times as "awkward, self-deprecating humor", O'Brien's late-night programs combine the "lewd and wacky with more elegant, narrative-driven short films". His remotes have also become some of his best-received work, including the international travel series Conan Without Borders. With the retirement of David Letterman on May 20, 2015, O'Brien became the longest-working late-night talk show host active in the United States. This active streak ended with O'Brien's retirement from late-night television in June 2021, with his entire run as a late-night host lasting nearly 30 years.