Brian Gerard "Kato" Kaelin[a] (born March 9, 1959) is an American actor and radio and television personality.

[2] Kaelin was nicknamed "Kato" as a child after the Japanese character played by Bruce Lee on the television series The Green Hornet.

He pledged the Sigma Alpha Epsilon fraternity in the fall of 1980 and was accepted at the end of the term at California State University, Fullerton.

During his time at Eau Claire he created his own talk show, Kato and Friends, and hosted The Gameshow on the campus television station, TV10.

After Simpson was acquitted, the cover of an issue of the tabloid newspaper National Examiner featured a photo of Kaelin without his shirt on, with the headline "Cops think Kato did it!"

Kaelin sued the publisher, Globe Communications, for libel, alleging that the cover headline implied he was suspected of the murders.

This was reversed by the US Court of Appeals for the Ninth Circuit, which ruled: We hold that reasonable jurors could find that clear and convincing evidence established: (1) the front page headline falsely insinuated that the police believed that Kaelin committed the murders; and (2) the false insinuation was not necessarily cured by ... subheading or by the non-defamatory story about Kaelin that appeared 17 pages away.

We also hold that Kaelin produced sufficiently clear and convincing evidence of the newspaper's knowledge of falsity or reckless disregard for the truth of its headline to defeat a motion for summary judgment.

"[13] Soon after the trial, Kaelin appeared on the first episode of the Fox sketch comedy MADtv (October 1995) and made a cameo appearance on the HBO sketch comedy Mr. Show with Bob and David during the series' first season (November 1995); in the latter series' episode titled "We Regret to Inform You", he shows up at lobotomized actor Borden Grote's party.

In 1995, from the popularity of the Howard Stern Show, the Los Angeles radio station 97.1 KLSX which had played Classic Rock after Stern in the morning, switched to an All Talk format, and Kato Kaelin, along with standup comic Bobby Hellman, hosted an afternoon show (following Susan Olsen and Ken Ober).

The Playboy bunnies, WWE Divas, and pin-up models competing in the no-limit Texas hold 'em games, and upon losing all their chips and clothes, had to dive into the "Pool of Shame" and visit "Kato's Guesthouse", where he would interview the nude defeated players.

For a short time in 1995, he worked as a radio talk host on KLSX in Los Angeles, and provided online content for National Lampoon.

[24] In 2019, Kaelin was a house guest in the second American season of the reality show competition Celebrity Big Brother.