Aniston's wedding guests waiting by phone for invite

Jennifer Aniston's wedding guests are on standby for her big day.

The 44-year-old actress is reportedly set to marry Justin Theroux imminently and has told guests, including her mother Nancy Dow, who she was previously estranged from, to be prepared to move quickly once they receive information about the whereabouts of the extremely private celebration because they will only be given short notice.