The 2000 Year Old Man is a comedy sketch created by Carl Reiner and Mel Brooks in the 1950s and first publicly performed in the 1960s. Brooks plays a 2000-year-old man, interviewed by Reiner in a series of comedy routines that were turned into a collection of records and also performed on television.

The foundation for the routine was laid during production of Your Show of Shows, where Reiner was an actor and Brooks was a writer. Reiner describes the first instance:

I remember the first question I asked him. It was because I had seen a program called We the People Speak, early television. [He puts on an announcer voice] "We the People Speak. Here’s a man who was in Stalin's toilet, heard Stalin say, 'I’m going to blow up the world.' I came in, I said this is good for a sketch. No one else thought so, but I turned to Mel and I said, "Here's a man who was actually seen at the crucifixion 2,000 years ago," and his first words were, "Oh, boy." We all fell over laughing. I said, "You knew Jesus?" "Yeah," he said, "Thin lad, wore sandals, long hair, walked around with 11 other guys. Always came into the store, never bought anything. Always asked for water." Those were the first words, and then for the next hour or two I kept asking him questions, and he never stopped killing us.

It began as a joke between the two that was then shared at parties. Reiner started bringing a tape recorder to the parties as Brooks never said the same thing twice. Numerous people such as George Burns suggested to the two that they put their material on an album, but only Steve Allen managed to coax the two to come record it in his studio. Reiner recalls the moment he and Brooks realized the first album was going to be a hit:

When we made the album, the album came out, we weren't sure yet whether everybody was going to like it. And it was Cary Grant, who was my neighbor at Universal Studios, he came over and I gave him a record and I said the new record came out, you may like this. And he came back a week later, said, Can I have two dozen? I said, What are you going to do with them? He said, I'm going to take them to England. I said, You'll take these to England? He said, Yeah, they speak English there. Anyway, he came back and said, She loved it. I said who? The Queen Mother. I said, You played this in Buckingham Palace? He said yes. And then Mel says, Well, if the biggest shiksa in the world loves it, we're home free.

Reiner was the straight man, asking interview questions of Brooks, who would improvise answers in a Jewish-American accent. The free-wheeling semi-improvised sketches covered a wide variety of topics from marriage ("I have been married several hundred times") and children ("I have over 42,000 children and not one comes to visit me!") to transportation ("What was the means of transportation then? Mostly fear.").

The quality of the sketch was elevated by the quick improvisational wit of Brooks, who would usually use a question as a springboard to unplanned exposition and tangents that would be as much of a surprise to his partner as it was to the audience. Reiner continued to act as the voice of the audience, providing questions and challenging Brooks' answers. "He was like a district attorney" claims Brooks. Reiner's knowledge of history and momentous events raised the bar on the exchanges. "I knew the questions" quipped Reiner, "but I didn't know the answers." While Reiner deferred the great lines to Brooks, he knew his friend well enough to follow along and cross paths enough to prop him up for more opportunities.

Their first television appearances performing the sketch were on The Ed Sullivan Show in February 1961 and then on The Steve Allen Show eight months later.