London: Actress Helena Bonham Carter says she and director Tim Burton have never married because they are too lazy but this does not mean they are not serious.
The couple has been together for 11 years and have children eight-year-old Billy and four-year-old Nell.
They live in adjoining houses because they need space from one another, though the actress insists this does not mean their relationship was not serious.
"We are not married, actually. Not through any kind of. Through laziness, really. Our houses are married. It is very good to have. You definitely need your space," femalefirst.co.uk quoted her as saying.