Catherine Zeta-Jones and Michael Douglas (With a 25-year age gap)
Even after their divorce, Michael Douglas and Catherine Zeta-Jones have been regarded as one of the most well-known couples in Hollywood for almost two decades. When they started dating, many people were curious to see how their 25-year age difference would affect their connection.
Even though they had to overcome several difficulties to find bliss, their relationship has been going strong for a long time.