Although Hollywood actresses would like to make you think that there's no real rivalry between them and that they spend most Friday nights braiding each other's hair and playing Dream Phone, that's not always the case.
After Sandra Bullock won the 2010 Best Actress Oscar over Meryl Streep and after she provided us with this brilliantly public snub, the two have indulged in a playfully antagonistic relationship.
But while we were speaking to Bullock for the release of heart-racing space thriller Gravity, she revealed the truly harrowing details of just how nasty things get between the pair...
"If Meryl and I get in a ring, she'll kick my ass," she told us exclusively. "People don't realise that there's a side of Meryl that's just mean. You walk away and she'll just rip your dress...I know not to turn my back on her."
Bullock also confessed that she's convinced that the Oscar-winning star of The Devil Wears Prada will eventually lead to her untimely end.
"I will try to kick her ass but she will kill me," she confessed. "That's just how it's gonna end and then she'll be lovely Meryl again and I'll just be dead."
Okay so just in case you're worried she wasn't joking...
"We will have a nice sparring I hope until the day we die," she also said. "I love nothing more than hanging out with that woman and having a glass of wine."
Either way, get those two in a ring. We'll pay good money.
You can see the full video interview next week.
Gravity hits cinemas November 7