Brad Pitt and Angelina Jolie to tie the knot?

Brad Pitt and Angelina Jolie are reportedly planning to get married.

They are eyeing a low-key affair in order to avoid accusations of wasting money, reports Contactmusic.

The couple raises six children, Maddox (8), Pax (6), Zahara (5), Shiloh (3) and 21-month-old twins Knox and Vivienne.

A friend of the couple told America's OK! magazine, 'Brad and Angelina are exceptionally private people, and they pride themselves on being humble and not wasting money.

'So some over-the-top, beachfront affair with hundreds of guests isn't going to happen.'

A source close to Brad -- who was previously married to Jennifer Aniston -- and Angelina said, 'First it was Maddox, who has begged his parents to tie the knot for years.

'Lately, Shiloh and Zahara have been chiming in, and Pax thinks it would just be the coolest thing ever to be a ring bearer.'

Photograph: Mario Anzuoni/ Reuters