Washington: Catherine Zeta Jones has revealed the secret behind her 13 years of blissful marriage with her husband Michael Douglas.
The 43-year-old actress told a UK publication that respect, space and a sense of humour are the secrets of her successful marriage, Contactmusic reported.
The actress added that despite the 25-year age difference, they are similar in many ways and have an apathetic, easy-going relationship.
The 68-year-old Douglas is a schedule freak and an organized person, whereas his better half claims to be lackadaisical yet spontaneous and their differences help them maintain a healthy romance and complement each other.
Though the couple spends quality time together, they carefully maintain their space.