(Cover) - EN Showbiz - Cameron Diaz and Jennifer Lopez are reportedly embroiled in an on-set feud.

The two actresses are currently filming What to Expect When You're Expecting in Atlanta but are not getting along.

Star magazine claims that Cameron and Jennifer "don't like each other" and avoid each other whenever they can.

"They don't interact much, but when they do, the tension is thick," an insider told the publication.

Jennifer has reportedly bonded with her other co-star Brooklyn Decker and has been linked with her on-screen beau Rodrigo Santoro.

"Cam sees all that stuff and the hoopla around J.Lo's divorce from Marc Anthony and whether she's dating Rodrigo as a distraction from work," the source claimed.

"She's also annoyed by Jennifer's huge entourage, which includes her mom, three assistants, makeup and hair people and her manager.

"She made a snide comment to the effect of, How many people does it take for one woman to film a simple scene?'"

Cameron is even said to have taken a shot at the mother-of-two's acting skills.

"She said Jennifer has a lot to learn and made a dig about how she'd be better off sticking to her day jobs meaning singing and judging Idol," the insider added.

But Jennifer does not appear to care about the snub and the insider says "she doesn't talk about Cam or ask about her".

"She just acts as if Cam doesn't exist," the source says of Jennifer who recently signed on for her second year judging American Idol. (C) Cover Media