BRAD PITT has a love rival in his own living room – fiancée ANGELINA JOLIE’s hunky ex-hubby JONNY LEE MILLER!

The oddball beauty brought out Brad’s jealous streak by secretly recording Jonny’s hit new TV series “Elementary” – after telling him the show was “a dud.”

The lovers’ spat started after Angelina tuned in to the show’s first episode on Sept. 27, telling Brad that she wanted to “critique Jonny’s acting performance and see how he’s aged,” a source revealed to The ENQUIRER. “Afterward, Angelina told Brad that she thought the show was so bad she could barely make it through the entire episode.”

But later Brad discovered that Angie had been recording “Elementary” behind his back and then watching the episodes when he wasn’t around, added the source. What’s worse, their kids were watching it too!

Angelina, 37, and Jonny, 40, her first husband, married in 1996, but separated the following year. Although their split was rocky, they’re now on friendly terms.

“Elementary,” which airs on CBS, presents a modern-day take on Sherlock Holmes and his crime-solving partner. Angelina is reportedly enamored with her ex’s portrayal of the fictional detective – and she’s not alone.

“Her daughters Zahara and Shiloh have a crush on Jonny, and Angelina’s boys think the show is cool too,” noted the source. “Of course, when Brad found out their kids were fans of Jonny’s show, it made him even more furious!”

 This isn’t the first time Angie’s close ties to an ex have rocked her relationship with Brad. In February, The ENQUIRER reported that Brad stormed out of a Berlin restaurant in tears after learning that Angie had made plans to meet up with her second ex-hubby, Billy Bob Thornton, behind his back.

Angelina managed to soothe Brad’s feelings back then, and it appears she’s done it again.

“It took some swift talk­ing on Angelina’s part, but she was eventually able to calm Brad down,” said the source. “She reassured him that her heart belongs to him and that Jonny isn’t a threat to their relationship.”