The couple confirmed their engagement in April and have been rumoured to be tying the knot on August 11, which is also Pitt's parents' wedding anniversary.
Jolie's cousin Martin Poucher has claimed that the actress and Pitt will not allow a lot of friends or family to attend the ceremony, and admitted that he does not expect an invitation.
"Trust me, there will be no wedding invitation," Poucher told Celebuzz. "The family has joked about who will be invited."
It was recently reported that Pitt has been planning every detail of his wedding as Jolie is not in a hurry to become a wife.
Pitt and Jolie's children - Maddox, 10, Pax, 8, Zahara, 7, Shiloh, 6, and twins Knox and Vivienne, 3 - are thought to be heavily involved in the wedding ceremony.