When John Ritter passed away unexpectedly in 2003, fans and celebrities alike were heartbroken. That sorrow also extended to Ritter's castmates from 8 Simple Rules , which the beloved actor was starring on at the time of his passing. But, even in the wake of his parting, many of his colleagues, including Kaley Cuoco , continue to keep Ritter's memory alive decades later. Cuoco, who played eldest daughter Bridget Hennessy on the ABC sitcom, is now sharing the biggest lesson she learned from her on-screen dad.

After losing the sitcom star, Ritter’s wife, Amy Yasbeck, created the John Ritter Foundation. Ahead of the organization's annual "Evening From the Heart" event, TV Insider caught up with Cuoco and some of her co-stars who were also in attendance. When asked about working with

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