Brad Pitt designed the perfect engagement ring for his partner Angelina Jolie.

It has been rumoured for some time that the couple - who raise six children together are ready to tie the knot.

Beverly Hills jeweller Robert Procop has confirmed that the pair indeed have wedding plans on the horizon.

"I can confirm that, yes, Robert Procop did indeed design an engagement ring for Angelina Jolie, designed in collaboration with Brad Pitt," Robert's representatives told The Hollywood Reporter.

Brad worked long and hard on crafting this ring to perfection.

"Brad had a specific vision for this ring, which he realised over a yearlong collaboration," Robert told the publication. "He wanted every aspect of it to be perfect, so I was able to locate a diamond of the finest quality and cut it to an exact custom size and shape to suite Angelina's hand. Brad was always heavily involved, overseeing every aspect of the creative design evolution. The side diamonds are specially cut to encircle her finger. Each diamond is of the highest gem quality."

Angelina was seen wearing the ring on April 11 at a private museum viewing in Los Angeles.

The engagement has not yet been confirmed by Brad and Angelina's representatives.

The pair are parents to adopted kids Maddox, ten, Pax, eight, and seven-year-old Zahara as well as biological children Shiloh, five, and three-year-old twins Knox and Vivienne.