Jennifer Aniston might not be pregnant herself yet, but it looks like she's got a new baby on the way in her life. The Hollywood actress is going to be an aunt as her brother, AJ, is expecting a child with his fiancé, Adriane Hallek.

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Even though Aniston is not particularly close to her brother, sources close to the star say she's also excited for the newest arrival of her family, even though she's been longing for a child of her own for years now. For now though, she'll be able to enjoy her new nephew, who is due later this Fall.

An insider tells Star Magazine, "It's a bittersweet situation for her, because as everybody knows, she's been longing for a baby of her own for years now."

Jennifer Aniston Feeling Pressure From Her Family To Get Pregnant 

The source added, "Of course, she'll be happy for AJ, even though they're not close, but it will likely trigger those hurt feelings, too, that she's not been lucky enough to be a mom herself."

AJ is the son of Aniston's father John Aniston and his second wife, Sherry Rooney.

In addition to AJ's baby news, it also seems as though Aniston is getting pressured by her father to get pregnant as well. The elder Aniston is worried that he might not have enough time to enjoy his grandchildren if his daughter delays her pregnancy plans any more.

"Jen's dad... knows that if she doesn't hurry up and get hitched, he might not live long enough to see her kids," a source says of the 80-year-old actor. "He's anxious to see his grandchildren before it's too late."

"It would be ironic if AJ makes his dad a grandfather before his sister Jennifer does," the insider added. "I don't think anyone is expecting that!"

Tags: Jennifer Aniston