JASON GOULD, Barbra Streisand’s 46-year-old son, has gotten insanely jealous of all the attention his famous mom has lavished on Seth Rogen, her younger co-star in “The Guilt Trip.”

“Jason’s green-eyed with envy over all the praise Barbra has given Seth,” a family friend told The ENQUIRER.

“It’s really started to rankle him, especially since he was the one who told her she should do the film.”

In the new comedy, Seth plays an inventor who goes on a cross-country road trip with his mom (Streisand) as he tries to sell a new product and reunites her with a long-lost love.

As we revealed last week, Streisand, 70, and Seth, 30, hit it off because the diva reminded him so much of his own mom, say sources.

She even began calling him “Sonny Boy.”

As The ENQUIRER reported in July, Barbra’s only child Jason was being urged to write a no-holds-barred book about his superstar mom. He nixed the idea after their rocky relationship got back on track.

“But now his mom has been complimenting Seth at every turn, it could jeopardize the delicate balance,” said the source. “He sees Seth as a rival for his mother’s love.

“Barbra is crazy about Seth, but her heart and soul belongs to Jason. She’s glad he’s finally come around to appreciate her.”