Once shared an apartment with Bill Cusack.

Son-in-law of Seattle Dixieland band-leader Jake Powel.

Son, Beckett O'Brien, was born on November 9, 2005 in New York City, weighing in at 8 lbs. 4 oz.

The name of his production company, Conaco, was chosen to echo the name of petroleum company Conoco.

Replaced David Letterman in the late night slot on NBC after Letterman left for CBS. Virtually no one thought the show, now in its 11th year, would make it.

Calls where he sits "The Chat Zone."

Graduated magna cum laude from Harvard University, with a BA in American History & Literature. [1985]

Brother of Jane O'Brien

Took tap dancing lessons as a child

Cousin of Denis Leary, Jack Leary and Ann Lembeck.

Often tries to calm his Late Night audience with the term "Cool Babies". This is a lyric from the Talking Heads song Burning Down The House.

His favorite episode of "The Simpsons" (1989) is "Marge vs. the Monorail".

He was editor of the Harvard Lampoon for two years in a row, and he is the second person to have ever done this. It had been 85 years since it was done.

Once shared an apartment with comedian/actor Jeff Garlin in Chicago across from Wrigley Field before both of them made it big.

Owns a summer home in Norfolk, Massachusetts.

Is an avid fan of filmmaker Kevin Smith.

Plays guitar.

In the beginning season of the show, he signed a new contract every week because the network was doubtful of the show's future and his ratings.

Lives in Manhattan's fabled West Side apartment building, the Apthorp, whose residents include Rosie O'Donnell, Steve Kroft, Cyndi Lauper, Kate Nelligan and Lena Horne.

Daughter Neve O'Brien born October 14, 2003 in New York (6 lbs., 10 oz.).

Lived with Lynn Kaplan. [1994-1999]

Calls where he does his monologue "The Laugh Zone."

Has a golden retriever named Hudson.

One of his all-time favorite television shows is "The Odd Couple" (1970).

Worked as a warmup comic for the "The Wilton North Report" (1987).

In the 2001 film, Sugar & Spice (2001), one of the cheerleaders is obsessed with "Conan O'Brien".

Will become the 5th host of "The Tonight Show" on its 55th anniversary.

Appeared as an extra and bit player on a number of skits on "Saturday Night Live" (1975) - notably as "Sheriff Andy" in a "Twin Peaks" (1990) parody with Kyle MacLachlan, and drinking in the bar in the "Irish Drinking Songs" commercial parody.

For Conan, the most beautiful woman in the world is Gisele Bündchen. He had the opportunity of telling her personally this when she was a guest on his show in 2005.

Often criticizes the vegetarian and vegan community, subtly stating his dislike of the lifestyle.

Originally wanted to name his daughter the old-fashioned Irish feminine name Niamh (pronounced "knee-vh" or "neh-v"), which means "radiance, lustre, brightness" -- but decided that her life would be easier if they Americanized the spelling to Neve.

A graduate of Brookline High School.

Both of his parents are of Irish descent.

He will host "Late Night with Conan O'Brien" (1993) until 2009 when he will replace Jay Leno as host of NBC's Tonight Show.

When Burt Ward was asked to give a speech at Harvard about his role on "Batman" (1966), he brought the original costume, said to be valued at half a million dollars. Some students came up to him dressed as security guards and told him they would keep the costume safe. Then in the middle of the speech, one student stood up and asked, "When is a costume not a costume? When it's stolen." The lights dimmed and the students grabbed the costume and made off. After snapping pictures with one another in the cape, they later called Ward and gave the costume back. The ringleader of the gang? Harvard Lampoon editor, Conan O'Brien.

Married Liza Powel on January 12, 2002, in a full Catholic Mass by Father Paul O'Brien (no relation) at St. James Cathedral in Liza's home town, Seattle. The couple met when Liza was a guest on Late Night.

Met Lisa Kudrow in an acting class. They dated, and the two remain very good friends to this day.

In one episode of his show, a Finnish man in his audience pointed out to him that he looked like President Tarja Halonen. He decided to support Halonen in the election campaign in 2006, and started a skit called "Pro-Finland, Anti- Sweden". Halonen met with him and Halonen gave to him as a gift, Moomin dolls for his family.

Close friends with writer Chris Graves.

His show was cancelled for one night and brought back because the network's executives wanted to find a replacement show before cancelling the show. A replacement show was never needed.

Born at 1:38pm-EST