Russell Crowe's son is all grown up and graduating from high school

Russell Crowe's son Charles has graduated from high school.

Russell Crowe's first-born son Charles is all grown up and graduating from high school.

The 17-year-old, whom Crowe shares with his ex-wife Australian singer Danielle Spencer, looks much like his famous father in a rare new photo posted to Spencer's Instagram account.

Spencer, 52, who divorced Crowe in 2018 after 15 years of marriage, uploaded a photo of her eldest son to mark his graduation.

"Wow. Charles Spencer Crowe graduated from High School today! Time is flying way too fast. So proud of you. Love you beyond words Charlie."

The Oscar-winning Australian actor, 57, and Spencer also have a second son, Tennyson, 15.

The former couple met in 1989 on the set of the film The Crossing, before getting married in 2003 in a specially built chapel on Crowe's Nana Glen farm near Coffs Harbour.

They later announced their split in 2012 but didn't finalise their divorce until six years later.

Russell Crowe and his then-wife Danielle Spencer with their children Charles Spencer Crowe, right, and Tennyson Spencer Crowe, left, in 2010. Photo / Getty Images

Despite Crowe's estimated wealth of $90 million at the time, Spencer got a settlement of just $18 million and the couple's Sydney house, thanks to a pre-nuptial agreement.

But the pair remain friends and even take the occasional family holiday together.

Crowe told news.com.au during an interview in 2015 – three years after their split – that Spencer was "a great mum". He added that his work travel demands were a contributing factor to their separation.

Danielle Spencer with her and Russell Crowe's sons - Charles (left) and Tennyson (right).

"The platform we have set for the boys is one of consistency. It was clear when we were travelling together that it wasn't the healthiest thing for the kids," Crowe said at the time.

"They had to change schools, make new friends all the time, and there was something in that style of life where the grounded shifted under them all the time. That wasn't good for them.

He added: "As a parent, you have a connection with your children that is beyond anything else. We always talk in terms of female intuition, but it can be expanded to parental, mother or father."