Simon Cowell’s unusual behavior on AGT: Why is the judge not speaking throughout Season 18?

During filming, the music mogul experienced a health problem.

Simon Cowell has long been known for his sharp tongue and biting remarks, so it came as a surprise when the 63-year-old appeared more subdued than normal during season 18 of AGT.

Rather than chiming in as co-stars Heidi Klum, Sofia Vergara, and Howie Mandel discussed tryouts, Simon remained silent – but not for lack of interest.

Simon hasn’t been speaking much during season 18 of AGT owing to a medical concern, which he explained in an interview with USA Today.