Pushy Leah Remini is alienating her co-stars on The Talk, and sources say vicious behind-the-scenes battles are threatening to destroy the CBS talk show.

The King of Queens star “is a total terror who has ticked off all four other co-hosts with her antics,” an insider told The ENQUIRER.

Leah, 40, has even been fighting with her former close pal, Holly Robinson Peete. “At one point this season, Holly told Leah to speak more softly,” said another source. “Leah went ballistic and said, ‘Yeah, well at least I have something to say.’

“The two women looked like they were ready to kill each other.”

CBS recently picked up the show – which is similar in format to ABC’s The View – for a second season after it drew favorable ratings. The five hosts are Leah, Holly, Sharon Osbourne, Julie Chen and Sara Gilbert.

“Leah stirs the pot every chance she gets,” divulged the insider, who added that Leah has had run-ins with each of her co-hosts and some members of the crew.

Pick up this week’s ENQUIRER for the full story!