BRAD PITT likes his women THIN – scary skinny thin! LEARN WHY!

ANGELINA JOLIE has scared fans with her gaunt, skeletal figure – and it appears Brad Pitt is the architect of her frightening weight loss.

The reigning Hollywood heartthrob prefers his ladies to be rail-thin, and he lets them know it, say insiders.

“Brad doesn’t come out and demand his women be skinny, but in a not-so-subtle manner, he drops hints,” revealed a close source.

“If he’s constantly comparing his current girlfriend with his exes, it has to start making them feel self-conscious about their bodies.”

The  “Moneyball” star, 48, likes his women super-thin for their red-carpet appearances, says the close source.

When Angelina, 36, first met Brad on the set of “Mr. & Mrs. Smith” in 2004, she weighed 115 pounds, which seemed healthy for her 5-foot-7 frame.

“But now she’s wasting away at less than 100 pounds!” declared an insider.

Brad is also said to have hinted that Jennifer Aniston needed to drop a few pounds when they first started dating.

“He used to talk to her about how thin and  fashionable his former girlfriends Juliette Lewis and Gwyneth Paltrow were,” said the close source. “It was a way to motivate her.”

Jen lost the curves she used to show off on “Friends”and the 5-foot-5 1/2 actress dropped to a waifish 109 pounds.

Today, Jen, 43, is dating actor/ screenwriter Justin Theroux and is a shapely 120 pounds.

When Brad dated Gwyneth Paltrow for three years in the 1990s, the 5-foot-9 stunner “always felt she was too heavy for him,” revealed the close source.

In 1996, she shrunk down to a boney 101 pounds for the premiere of her film “Emma.” But today, as a working mom, “The Avengers” star, 39, looks fab at 120 pounds.

And “Natural Born Killers” babe Juliette Lewis, 38, who was with Brad from 1989 to 1993, boasts a killer 120-pound body.

However, when the 5-foot-6 star dated Pitt, the close source says she was 15 pounds lighter and “all skin and bones.”