Nancy Dow, 76, heard the exciting news along with the rest of the world when the rep for her daughter's fiancé Justin Theroux announced the couple's engagement to People magazine on Sunday night.
But it seems she hasn't taken the oversight to heart.
"Nancy is absolutely delighted Jennifer is going to marry Justin," a family insider told Radar Online.
"The first she learned of the engagement though was last night after an official announcement had been made to the press."
Nothing comes between that telepathic mother-daughter connection, though.
"[Nancy] had an inkling that Jennifer was happy and ready to settle down — but because she's pretty much estranged from her daughter she only learns bits and pieces through Jennifer's half brother John Melick," said the source.
Jen's had it in for Nancy since she published a tell-all memoir about her daughter in 1999.
They supposedly mended their rift after Jen and Brad Pitt broke up in 2005.
But not telling your mum that you're going to be walking down the aisle? Well, we doubt Nancy will be donating "something old" for her daughter's big day.