Nicole Kidman has reportedly been banned from attending her son Connor Cruise's upcoming wedding.
But what's the reason behind the family feud?
Nicole shares kids Isabella, 26, and Connor, 24, with ex-husband Tom Cruise , who she was married to from 1999 to 2001.
Following their split, the children stopped calling her mum and chose to live with their dad.
And the reason behind the fall out is all to do with religion.
Connor is a Scientologist, just like his famous dad.
He's soon to marry his Italian girlfriend Silvia, dubbed the 'Scientologist Princess'.
Here's why Nicole, who also mum to Sunday, 10, and Faith, eight, with husband Keith Urban, reportedly won't be there...
Tom Cruise 'BANS Nicole Kidman from their son's wedding'
Nicole and Tom adopted Isabella and Connor after tying the knot in 1990, but Nicole is said to have had a rocky relationship with them both over the last 18 years.
Speaking about her children once, Nicole suggested she was simply "private" when it came to them.
She told Australia's Who magazine: "I have to protect all those relationships. I know 150 per cent that I would give up my life for my children because it’s what my purpose is.
"They are adults. They are able to make their own decisions. They have made choices to be Scientologists and, as a mother, it’s my job to love them.
"And I am an example of that tolerance and that’s what I believe - that no matter what your child does, the child has love and the child has to know there is available love and I’m open here."
She continued: "I think that’s so important because if that is taken away from a child, to sever that in any child, in any relationship, in any family - I believe it’s wrong. So that’s our job as a parent, to always offer unconditional love."
People have questioned before why Nicole never mentions Connor and Bella, who have chosen to follow the Church of Scientology, in her acceptance speeches.
Last year, Nicole only mentioned the children she shares with Keith as she accepted a Golden Globe.
The explanation could lie within 2015 documentary Going Clear: Scientology and the Prison of Belief.
Director Alex Gibney implied that the religion drove a wedge between Nicole and her oldest children.
The Church has denied the claims and Nicole has previously spoken out against suggestions the religion has anything to do with it.
Inside Tom Cruise and Nicole Kidman's acrimonious relationship - as he bans her from son's wedding
But former Scientologist Leah Remini said in her book, Troublemaker: Surviving Hollywood and Scientology, she implied Nicole was made an "SP" by the church.
That stands for "Suppressive Person", a term said to be given to former members and to indicate that they've been "cut off" from their family.
Leah claimed Bella herself even referred to her mother in this way, but again, the church has denied the claims.
When Nicole and Tom split, Bella and Connor stayed with their adoptive father, who continued to raise them as devout members of the church.
Nicole wasn't present at Bella's wedding in 2015 either, and the pair haven't been photographed together since 2006.
It's said they still talk from time to time, but Nicole herself once said that both Bella and her brother stopped calling her 'mum'.
She said in 2007: "My kids don't call me mommy, they don't even call me mom. They call me Nicole, which I hate and tell them off for it."
She also spoke about the children living with their father and her wish that things were different.
She said: "They live with Tom, which was their choice. I'd love them to live with us, but what can you do?"
However, in 2014, Connor denied he was estranged from Nicole.
He told Australian mag Woman's Day: "I don't care what people say. I know that me and mum are solid. I love her a lot. My family means everything."
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