Guillermo Rodriguez is the well-known sidekick and on-air personality on the late-night talk show "Jimmy Kimmel Live!" He started on the show as a parking lot security guard at the Hollywood Boulevard Studios, where the show is filmed, before becoming a regular personality. Guillermo is recognized for his appearances in comedic skits and his role as the show's security guard character. His popularity grew due to his charming, everyman persona and his signature segment, "Guillermo's Hollywood Roundup," where he humorously comments on celebrity news and pop culture. He was born in Zacatecas, Mexico, and became a U.S. citizen in 2005. Guillermo initially was reluctant to appear on camera but was persuaded and then became a staple on the show, often playing humorous characters and providing comic relief alongside Jimmy Kimmel. He is also known for red-carpet interviewing duties and celebrity interactions, making him a beloved figure on the show.