Michael Douglas is older than his in-laws

Michael Douglas has revealed he and wife Catherine Zeta-Jones still have a healthy sex life.

There's a 25-year age gap between the couple, who tied the knot in 2000. 

‘God bless [Catherine] that she likes older guys,' says Michael, 65.

‘And some wonderful enhancements have happened in the last few years - Viagra, Cialis - that can make us all feel younger.'

But Michael, who has Dylan, 9 and Carys, 6, with Catherine, 40, admits age can be a drawback.

‘I wince when I think I'll be close to 75 when my daughter is 16,' he tells AARP magazine.

‘I'm not going to be able to physically chase the boys away!'