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Bonding over their shared passion for horse riding, Cuoco married equestrian Karl Cook in 2018. This relationship felt healthier—they were supportive of each other’s careers, lived apart at times, and prioritized their animals. However, in 2021, they announced their separation, stating they realized they were better as friends. Unlike the Sweeting divorce, this was amicable and drama-free.
While playing on-again-off-again Penny and Leonard, Cuoco and Galecki dated in secret for nearly two years. They never walked red carpets together, keeping their relationship private to avoid complicating the show’s dynamic. After their amicable split, they remained close friends—a rarity in Hollywood. Cuoco later said they were “too similar” and that breaking up was mature and necessary.