How Brad Pitt and Angelina Jolie's Custody Negotiations Could Turn Ugly

How Angelina Jolie Set the Tone for Possible Custody Battle With…

Meghan King on ‘RHOC,’ Motherhood and Custody Battle With Ex-Hus…

Ben Affleck Tries to Make Peace Between Matt Damon and Jimmy Kim…

Matt Damon Shares How He Feels About ‘Terrible Human Being’ Jimm…

Ben Affleck Explains Matt Damon's ‘Air’ Transformation (Exclusiv…

Ben Affleck Reacts to Becoming ‘One of the Poster Boys for Actor…

How Riley Keough Is Handling ‘Daisy Jones’ Success and Impending…

Matt Damon’s Daughters Make Rare Public Appearance at ‘Air’ Prem…

'Air': Ben Affleck Reunites With BFF Matt Damon for New Film Abo…

Jason Sudeikis Shares How He and Olivia Wilde Set Good Examples …

Alex Murdaugh Trial: Inside His Two Consecutive Life Sentences

‘How I Met Your Father’ Set Visit: John Corbett’s Role and Hopes…

Ben Affleck on How Jennifer Lopez Helped Him for ‘Air’ and His S…

How to Leave Winter Looks Behind and Get Ready for Warmer Weathe…

'Wild Things' Turns 25: Denise Richards and Neve Campbell Joke A…

‘Seeking Brother Husband’: Kenya on Meet-Cute With Tiger While M…

'Teen Mom 2' Star Jenelle Evans Tears Up After Regaining Custody…

Judd Apatow Praises Daughter Maude's Breakout Success (Exclusive)

90s Con: Stacey Dash and Elisa Donovan Dish on Possibility of 'C…
Angelina Jolie's filing for divorce from Brad Pitt has left major questions about what will happen to their six children.
Ian Halperin, the author of Brangelina, tells ET that the way Jolie filed could indicate that contentious custody negotiations are on the way.
WATCH: Angelina Jolie & Brad Pitt Divorce a 'Long Time Coming' -- Here's What Went Wrong
"It's going to be the most vicious divorce battle Hollywood's ever seen," Halperin tells ET.
Defying the tried-and-true Hollywood divorce strategy of issuing a joint statement and hashing out differences through mediation, sources tell ET that Jolie, 41, blindsided Pitt, 52, with her divorce filing. Halperin tells ET his sources back that up.
NEWS: Brad Pitt Speaks Out on Angelina Jolie Divorce: 'I Am Very Saddened by This'
"Everybody, including Brad, was shocked that she lawyered up," Halperin says. "They had a mutual agreement to work it out through mediation, but Angie, being the strong character that she is, she wanted to have the upper hand and come out swinging and make Brad look like the fall guy. Brad has told friends he is crushed, because he doesn't want to trash the mother of his children and he wants to work it out behind the scenes and to put on a brave face."
Jolie set the tone by requesting full physical custody of the kids: Maddox, Pax, Zahara, Shiloh, and twins Vivienne and Knox.
PICS: Angelina Jolie and Brad Pitt's Most Matching Moments
"She's really positioned herself for a career in the U.K.," Halperin explains. "If there is joint custody, Brad could block it and force them to live in the U.S., something she doesn't want. She wants all her children schooled and brought up in the U.K."
For a look back at the pair's fiery relationship over the years, watch the video below.