Robert De Niro, 75, splits with wife Grace Hightower, 63, after more than 20 years of marriage

Robert De Niro and his wife of more than 20 years have split.

The 75-year-old Casino star and his 63-year-old wife Grace Hightower ‘are no longer living together’ according to Page Six.

The couple are expected to ‘announce their breakup publicly in the coming weeks,’ reported the publication.

Happier times: Robert De Niro and his wife of more than 20 years, Grace Hightower, have split. The couple seen here in April 2018

The Raging Bull star was spotted on the red carpet on Monday at a MoMa event in New York City without the former flight attendant by his side. 

The couple share two children: 20-year-old Elliot and six-year-old Helen.

It is not the first split for the couple, who were wed in 1997. Two years into their union, De Niro filed for divorce, but it was never finalized.

The couple eventually reunited, renewing their marriage vows in 2004. 

All by myself: De Niro seen solo at a New York City event on Monday

All by myself: De Niro seen solo at a New York City event on Monday

Robert is notoriously private about his relationship with Grace but the pair are outspoken about their belief that their son Elliot’s autism is linked to vaccinations.

Explaining how Grace believes the his son ‘changed overnight’ after being vaccinated as a child, Robert told Today in 2017: ‘The vaccines are dangerous to certain people who are more susceptible.’

‘Nobody seems to want to address that, or they say they’ve addressed it and it’s a closed issue but it doesn’t seem to be.’ 

‘There are many people who will come out and say I saw my kid change overnight. I saw what happened, I should have done something and I didn’t.’ 

‘There’s more to this than meets the eye, believe me.’ 

Family matters: [L-R] Scott J. Campbell, Jarrod Spector, Jessica Keenan Wynn, Robert De Niro, daughter Helen Grace De Niro, Chilina Kennedy, Liz Larsen, Paul Anthony Stewart and Grace Hightower in 2015

Family matters: [L-R] Scott J. Campbell, Jarrod Spector, Jessica Keenan Wynn, Robert De Niro, daughter Helen Grace De Niro, Chilina Kennedy, Liz Larsen, Paul Anthony Stewart and Grace Hightower in 2015

Daughter: Drena De Niro seen here in 2016. She was adopted by Robert while he was married to her mother, Diahnne Abbott

Daughter: Drena De Niro seen here in 2016. She was adopted by Robert while he was married to her mother, Diahnne Abbott

The Meet The Parents actor had previously been married to actress Diahnne Abbott, from 1976 to 1988.

The pair had a son, Raphael, in 1976, and the Oscar winning actor adopted Abbott’s daughter Drena from a previous relationship. 

The Mean Streets star also has two children with ex Toukie Smith: twin boys Aaron and Julian.

Early days: Robert and Grace seen here at the premiere of Ronin in 1998

Early days: Robert and Grace seen here at the premiere of Ronin in 1998

The twins: Robert's ex Toukie Smith seen here with the couple's twin boys Aaron and Julian in 1998

The twins: Robert’s ex Toukie Smith seen here with the couple’s twin boys Aaron and Julian in 1998

His boy: De Niro [R] seen here with Grace and son Raphael (from his first marriage) in 2004

His boy: De Niro [R] seen here with Grace and son Raphael (from his first marriage) in 2004

De Niro spoke about his feelings on marriage in a 2013 interview with Katie Couric. 

The star of The Godfather Part II said that the secret to a happy union involved ‘a lot of give and take, standing your ground, because then you keep the respect you started out with.’ 

However, he shared some rather more cautious advice with The Independent in 2014, saying ‘The only thing I would say is that if you get married, it’s easier probably not to have children if you’re going to split up – it makes life simpler.’

Read more at DailyMail.co.uk