Lena Headey says she won't be returning her son to L.A. anytime soon -- father's wishes be damned -- because the American education system sucks.

Headey's ex-husband, Peter Loughran, claims in new legal docs Lena agreed to return their 6-year-old son from the U.K. after she was done filming "Game of Thrones" ... but didn't.

Headey supposedly emailed Peter saying she was enrolling their son in a Yorkshire school because the kid was being held back by a subpar American school system.

Loughran insists the deadline for returning the kid was Sept. 5th, so she's brazenly violated their deal and his right to make decisions for his child. She begs to differ, saying he agreed the boy could live with her in England.

Loughran says he hasn't seen his kid in 8 weeks ... Headey hasn't even let them chat on the phone.

The former couple will have a showdown in an American court next month.

Hayden Panettiere better think twice the next time she pawns off a couple dogs for 6 years ... at least that's the takeaway after she settled up with her former dog sitter.

You'll recall Tia Brooks sued Hayden back in July in a bizarre case. Hayden got 2 rescues and left them with a dog sitter for 6 YEARS, paying a whopping $119,335.88. Seriously.

But Hayden claimed the dog sitter was a crook, giving the pooches away but pretending she was still caring for them and billing all the while.

Brooks claimed everything she did was kosher and turned around and sued Hayden for the $8,500 balance she said was owed.

We've learned the case quietly settled. They split the doggie in half and Hayden paid Brooks $4,250.

Brooks appeared on "TMZ Live" shortly after filing suit and refused to say where Zander and Xena ended up. As for why Brooks says Hayden left the dogs with her for half a dozen years ... well, it's crazy.

Tokio Hotel guitarist Tom Kaulitz doesn't want to love the woman who loves him back anymore -- he's calling it quits with his wife ... TMZ has learned.

Tom, the twin brother of lead singer Bill, just filed divorce docs -- obtained by TMZ -- to part ways with Ria Sommerfeld, with whom he tied the knot a little more than a year ago.

Tom's citing irreconcilable differences, and wants the judge to shut down any request by Ria for spousal support ... we're guessing he's the breadwinner.

Tom and the rest of the Tokio Hotel crew have been making hits in both German and English for years, and it looks like he might have made most of his cash well before getting with Ria last year ... when he toured a bit but didn't put out any new music.

Their letzte tag together before separating was New Year's Eve.

Before this doll-faced cutie was making her mark in the modeling world, she was just another perfectly posed little lady growing up in Los Angeles, California. Can you guess who she is?

Mary J. Blige wants to make it absolutely clear that her prenup is solid as a rock ... but her estranged husband begs to differ.

The singer's lawyer, Gary Fishbein, filed docs asking the judge to give her prenup the stamp of approval. She's worried because the lawyer for Martin "Kendu" Isaacs has made sounds it's not worth the paper it's written on, calling it "immensely invalid, unenforceable and unconscionable."

Mary says they drew up the prenup on December 5th, 2003 and got married 2 days later. She filed for divorce back in July and asked the judge to block Isaacs' bid for spousal support.

It's pretty simple -- she says the prenup clearly lays out who gets what. If it's thrown out ... it'll be an ugly mess.

Stay tuned.

Being engaged to the CEO of a giant tech company has its perks -- just ask Miranda Kerr ... who says she's already had a go at wearing Snapchat Spectacles. 

We got the Victoria's Secret Angel at LAX where she gave us her take on her fiance Evan Spiegel's new camera glasses, and Snapchat in general -- she's a fan ... obviously. 

Check out the clip ... she even riffs on Evan's new foe, Instagram Stories ... and it sounds like she uses it as she pleases, or at least, she can if she wants.

Justin Bieber gave some lucky fans a DNA sample when he uncorked a sneeze during his concert in Finland.

Justin was doing his hit, "What Do You Mean?" ... when the countdown started on his snot rocket launch. Y'know how it is when you just can't hold back. Check out the video, which shows a juicy projectile going straight from JB's schnoz to the not-at-all cheap seats.

#BlessYou

For Justin, but more for the fan who took the hit. 

The guy who rammed Kylie Jenner's security gate just copped a plea deal, but he's still getting some time behind bars ... TMZ has learned. 

According to court docs, the Kyliegate perp was sentenced to 10 days in L.A. County Jail after pleading no contest to vandalism. He got credit for 4 days, and he's already started serving the other 6. He'll also be on probation for 12 months.

We broke the story ... Kylie had a determined admirer who crashed his car into her security gate at The Oaks -- the Calabasas gated community where she lives. Actually, make that LIVED.

Kylie got the hell outta Dodge after one too many run-ins with overzealous fans. 

Brad Pitt is alive and well, and if you click on a story claiming otherwise ... it could expose your phone, computer or other device to hackers.

Facebook is warning users not to click on what appears to be a FOX News report about Brad's death. If you do fall for it, and enter the requested info ... the bad guys can get your passwords and control of your account.

The malware is evil genius -- the hackers clearly preying on the public's interest in all things Brad and Angelina Jolie.

If you've already fallen for it (pretty embarrassing, eh?) ... FB suggests changing your password immediately and running its malware software scanner.

Cookie's assistant on "Empire" proved she's got her back in real life too by taking a jab at 50 Cent's mental health ... on the heels of him trash talking Taraji P. Henson.

Ta'Rhonda Jones, who plays Porsha on the show, came on "TMZ Live" to talk about the new season ... and addressed Fiddy's repeated shots at "Empire." Her take on it was pretty awesome -- she went right after the rapper/TV producer and flat out called him a "weirdo."

Taraji already went back at 50 after he claimed "Empire" ratings were slipping -- but she was kinda gentle about it. High road. Ta'Rhonda, on the other hand, lit into him and then gave him some advice.

For the confused ppl. Do REAL research!!! Loose change makes sooooooo much UNNECESSARY NOISE. STILL LOOKING FOR THAT DAMN CENT SIGN!!!😒 I guess it's obsolete 😔. AGAIN CONGRATS ON YOUR SUCCESS BLACK MAN!!! @50cent 😘😘😘

A photo posted by taraji p henson (@tarajiphenson) on Sep 24, 2016 at 11:09am PDT

Nick Jonas is burnin' up Hawaii with big help from a Venezuelan beauty.

We found out Sarah Duque Lovisoni is the model/actress Nick's been hanging with in Honolulu while he shoots "Jumanji." Check out the pics ... Sarah can wear the hell out of bikinis.

Get it, Nick.