JENNIFER ANISTON’s estranged mother who wasn’t invited to her first wedding IS on the guest list for her new nups.

While Nancy Dow wasn’t invited to Jen’s wedding to first husband, Brad Pitt, she WILL be on the guest list to see her exchange vows with fiancée Justin Theroux.

The estranged mom of the Friends beauty was told by Jennifer’s half-brother John Melick that this time around she will be able to see her daughter’s big day, and it’s all thanks to her new fiancé.

Justin believes strongly in family values and has managed to convince Jennifer that, despite their differences in the past, Nancy deserves a wedding invitation.

 “Nancy and Jennifer have had their ups and downs, but they’re going to let bygones be bygones and she will be invited to her daughter’s wedding,” a family insider revealed.

“She was told of the invitation by her son, John, which she was obviously delighted with.

“Sadly, the initial fallout between Nancy and Jennifer in 1999 meant that she wasn’t on the guest list for the 2000 wedding to Brad Pitt — something that always haunted her.

 “But the pair has healed their differences and, with the help of Justin, Nancy will get an invite this time around.

“Justin comes from a tight-knit family, who he is very close to. He preaches family values to Jennifer and he said to her he’d love a private, low-key ceremony with all their family members present.

“She agreed, said she’d forgiven her mom for her past discrepancies and that Nancy should be a guest at her second wedding,” the insider divulged.

Jennifer fell out with Nancy in 1999 over the tell-all book From Mother and Daughter to Friends: A Memoir.

But they pair have since reconciled and Jennifer rushed to her mother’s Los Angeles hospital bedside in September, 2011, when Nancy suffered a stroke reported.