Uma Thurman's ex accuses her of having serious mental illness and mixing alcohol with drugs during nasty custody battle over four-year-old Luna as he dismisses children at daughter's Brooklyn school as 'dirty' 

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Uma Thurman was accused of being mentally ill by her ex Arpad Busson in Manhattan Supreme Court on Friday during the first day of their custody battle over daughter Altalune 'Luna' Florence.

While questioning a court-appointed psychologist, Busson's lawyer Peter Bronstein asked if his client had explained her that Thurman 'had serious mental illness and this was a point of conflict because the mother resented being accused of having a serious mental illness.' 

Dr. Sara Weiss confirmed that she was told this multiple times by Busson and also noted it in her reports according to the New York Post.

When then asked however about the three medications Thurman was taking to treat depression, anxiety and insomnia and how they likely reacted to the alcohol she drank with them, Thurman's lawyer objected and managed to shut down the line of questioning.

The medications Thurman is currently taking according to Bronstein are Triazolam, Wellbutrin and Klonopin. 

Dr. Weiss later said under cross-examination that Thurman had 'some Attention-deficit/hyperactivity disorder' and 'mild learning disability,' but no 'personality disorder.'

Also on Friday, Bronstein stated that his client was not happy with the choice of school Thurman had made for their child, finding that other students there were 'disheveled and dirty.' 

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Day in court: Uma Thurman was accused of having a serious mental illness and mixing her medication will alcohol during her custody trial on Friday

Sleek: The medications Thurman is taking were said to be Triazolam, Wellbutrin and Klonopin

Baby daddy: Luna was conceived at the same time Thurman was fighting Busson to keep a million dollar ring, Busson's lawyer said in court on Friday 

Kids: Thurman has alleged that Busson frequntly cancels his scheduled visits with Luna (Luna above in center flanked by Thurman's son Levon and daughter Maya, whose father is actor Ethan Hawke)

The Oscar-nominated actress, 46, arrived to court on Friday dressed in black from head-to-toe, while her billionaire ex was seen entering the courthouse in a perfectly tailored navy-blue suit while carrying a copy of the Financial Times.

Things got off to an eventful start in the courtroom, with Dr. Weiss telling the courtroom that Thurman and Busson, 53, should not be allowed in the same room together when their daughter is present.

Dr. Weiss added that Thurman and Busson have a toxic relationship, which their daughter should be shielded from.

Bronstein later said that Luna was conceived at the same time Thurman was fighting Busson over whether or not she would be able to keep a million dollar ring. 

One of the reasons that Busson is hoping to change the current agreement according to his lawyer is because it has been difficult for him to travel to new York after a fungal infection resulted in doctors having to remove part of his lung. 

Busson also cannot be in the country for more than 120 days for tax reasons it was revealed on Friday. 

Bling: Uma showing off her her 20-karat engagement ring in 2012 (above)

Busson was taken to task as well by Dr. Weiss on Friday, who noted that 'Mr. Busson’s visits are focused on his needs rather than his daughter’s.'

As an example she recounted how Luna was once sent to the Bahamas to be with her father, who then left the island to see a Rolling Stones concert in Cuba with his son. 

On another occasion, Busson had Luna flown to London to be with him and the left her with his ex Elle MacPherson while he went to a soccer game. 

'At this point I don’t think that these people should be in the same room together with Luna until they have a little more ability to kind of be comfortable with each other,' testified Dr Weiss. 

She also stated that while Busson is a good father to his daughter, and the young girl enjoys her time with him, he should not be allowed to spend more than seven days with the girl.

Dr. Weiss said that this was important because the young girl was already showing signs of separation anxiety.

That number was given in response to Busson's request asking to have Luna for 10 days a month plus extended vacations.  

Fate: Thurman met Busson (left in 2013) while on a 2007 trip to Italy, during which she was seen posing at an event with Busson's ex Elle McPherson (right)

Difficult days: Thurman looked emotional back in May leaving an afterparty for the Met Gala in the midst of her custody battle (above being comforted by actor Andrew Rannells)

The couple is also fighting over Luna's education.

Luna is currently enrolled in private nursery school at St. Ann's, located in the city's Brooklyn Heights neighborhood.

Annual tuition for the nursery school is $25,000.

Past graduates at the school include Lena Dunham and Jemima Kirke of Girls, designer Zac Posen and Oscar-winner Jennifer Connelly.

'He felt they had small classrooms, they were cluttered, that the atmosphere was depressing, that the kids looked dirty and disheveled,' said Busson's lawyer.

Justice Matthew Cooper jumped in at that point saying: 'That’s going to really upset a lot of Brooklyn Heights parents.'

He then appeared to make a joke about Busson's residence in England by adding: 'Maybe it doesn’t compare with Eton.' 

Earlier in the day, the judge in the case also took some time to publicly criticize the warring parents in front of the court before the trial got underway.

'Reasonable people work these things out,' said Justice Cooper. 

Good Samaritan: Thurman helped a videographer who fell over on Friday outside court (above)

Busson is asking to have Luna for 10 days a month plus extended vacations (above on Friday)

Thurman is challenging Busson's request, alleging, among other things, that he often cancels his scheduled visits with young Luna. 

It is expected that the trial will last a week.

On Thursday, a judge denied Thurman's request to have the proceedings closed to the media.

There seemed to be no ill will  however on Thurman's behalf, as the actress took some time to help a fallen videographer on Friday while making her way into court. 

It was revealed back in October that that former couple would be going to trial after they were still been unable to come to an agreement over the custody of their daughter.

Busson, 53, is a French-born financier who currently runs Gottex Fund Management Holdings, an Swiss investment company.

He began dating Thurman back in 2007, proposing to the actress the following year and then calling it off a year after that in 2009.

The two then quickly reconciled and in 2012 Uma gave birth to their daughter, Luna.

In 2014, the pair broke up for good, and since that time have been battling over their daughter. 

Battle for baby: Thurman and Busson split in 2014, and have been fighting over custody of Luna ever since (Luna and Thurman swimming on left; doing yoga on Mother's Day on right)

Kids: Busson has two teenage sons, Arpad and Aurelius, whose mother is Australian supermodel Elle MacPherson. She once watched Luna in London while her husband went to a soccer match it was revealed in court

Busson filed a motion for temporary visitation rights on August 31 after first filing paperwork in the custody case, in which Thurman is the defendant, back in October of 2014.

Shortly after their breakup, Busson slapped Thurman with a lawsuit demanding more custody of their daughter. 

He also demanded the power to make important life decisions for their daughter.

Thurman’s representative released a statement after the lawsuit was filed: ‘It is unfortunate that this very private discussion regarding Mr. Busson's visitation rights and his participation in decision making has been made public.

‘However, we are optimistic that a fair agreement for both sides will be reached out of court.’

In September 2015, the couple finally reached a settlement, and the judge praised them for putting aside their issues aside for the benefit of their daughter.

At the time, the judge was quoted saying both parties had compromised very little to reach the settlement.

The terms of the deal, however, were sealed from the public and the terms remain confidential.

It was reported at the time that Thurman and Busson signed a three-year plan on how they agreed to co-parent their daughter.

Siblings: MacPherson posted a photo of son Arpad with Luna last year on Instagram

Husbands: Uma has been married twice before, first to Gary Oldman (left in 1991) and then to Ethan Hawke (right on 2002)

Busson headed back to court on August 31 however, making it clear that he wanted more custody of Luna.

He filed a Pendente Lite Visitation, which is usually only filed during an on-going battle, with one person seeking to have the judge award temporary visitation until the outcome of the case.

Once the final order on custody and support is issued by the judge, the temporary decision is voided.

It is unclear why he filed for temporary visitation rights if the couple reached a settlement last year.

Thurman also has two teenage children, son Levon and daughter Maya, with ex-husband Ethan Hawke. 

She was also married to actor Gary Oldman for two years. 

Busson has two teenagers as well, sons Arpad and Aurelius, whose mother is Australian supermodel Elle MacPherson.