Oscar-winning actor Robert De Niro and his wife of more than 20 years, Grace Hightower, have reportedly separated.

The New York Post's gossip column Page Six first reported that the couple are no longer living together and are expected to announce their split shortly.

They were last seen on the red carpet in June when they attended the 72nd Annual Tony Awards in New York City.

The couple wed in 1997 and have two children - 20-year-old son Elliott and six-year-old daughter Helen Grace. 

De Niro and Hightower previously parted ways, with the Taxi Driver actor filing for divorce in 1999 and engaging in a custody battle over their son. 

They smoothed things over and renewed their vows in 2004, with Martin Scorsese, Meryl Streep and Ben Stiller attending as guests.

Grace Hightower and Robert De Niro pose backstage during the 72nd Annual Tony Awards at Radio City Music Hall on June 10, 2018

The Raging Bull star has four other children; a daughter and son with former wife Diahnne Abbott, as well as twin sons with ex-girlfriend Toukie Smith.

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