Ouch. This has got to sting, especially since it's coming from one of Hollywood's most loved and well-respected actresses. There's a new report that says Julia Roberts is no fan of Amal Clooney even though she's close with her good pal and Amal's husband, George Clooney. In fact, things are so icy between the two women that Julia has supposedly called the human rights lawyer "image-obsessed" and "absurd."

According to In Touch Weekly's print edition this week (via Celebitchy) there's no love lost between Julia and Amal, who supposedly can't stand each other behind closed doors.

Things have gotten so bad between the two ladies that Julia was absolutely upset when Amal supposedly tried to "steal her thunder" at the Cannes Film Festival in the South of France earlier this month.

One source told the site, "Julia was stunned that Amal tried to steal her show and her thunder, and that George actually let her. So in retaliation, Julia flirted with George. Amal was seething!"

The insider added, "After spending some time with Amal and George in Como, Italy last summer, Julia left with a very bad taste in her mouth. Julia would mock image-obsessed Amal behind her back after seeing how Amal constantly had her hair and makeup touched up and wore glamorous gowns during a casual weekend. Julia laughed at her because she thinks she's so absurd."

So far both ladies have not made any comments about the rumors. George Clooney for his part hasn't said anything either.