London, Oct 16 - American singer-actress Nicole Richie is rumoured to have secretly married beau Joel Madden.

A source close to the couple revealed that they obtained a marriage licence and tied the knot in a secret ceremony Wednesday, reports mirror. co. uk.

In September, Richie gave birth to their second child - a boy named Sparrow. They also have a daughter - Harlow was born in January last year. (IANS)