10 Best Celebrity Cameos In How I Met Your Mother

6. Conan O'Brien

Britney Spears How I Met Your Mother
CBS

Conan O'Brien's cameo in How I Met Your Mother is the definition of blink and you'll miss it.

In the season 7 episode No Pressure, Barney quickly darts out of the bar, bumping into a man on his way out. The man turns ever so slightly, revealing that he is a tall redhead. Anyone who took a closer look could tell that it was, in fact, famed writer, comedian, and talk show host Conan O'Brien.

The funniest part of his cameo is that no one acknolwedges it. The characters don't notice him, the camera doesn't linger on him, and his appearance is more of a "bonus joke" for fans who payed extra close attention.

Contributor
Contributor

Richard C. Kraus (Richie to pretty much everyone) is an American college student and world record holder for most views of the 2015 film Ant-Man. He aspires to be a screenwriter, actor, and not tired.