After undertaking gruelling surgery to remove a tumour and reconstruct part of his jaw, rocker John Farnham has a reason to celebrate.

Farnham’s eldest son, Robert, took to social media on Thursday to announce his engagement to his girlfriend Mel.

“My best friend and love of my life said yes to marrying me,” the 43-year-old wrote, sharing photos from the special moment.

“I can’t wait to spend the rest of my life with you.”

Robert Farnham has announced his engagement to his girlfriend, Mel. Images: Facebook

Robert has followed in his dad’s footsteps to become a musician, singing for the rock band Rival Fire.

He and his younger brother James, along with their mum Jill, have rallied around Farnham in recent months as he continues to recover from marathon surgery.

The You’re The Voice singer was diagnosed with mouth cancer earlier this year before undergoing a 12-hour surgery to remove a tumour from his jaw.

His son’s news has prompted a flood of loving comments from fans congratulating the newly-engaged couple.

“This is beautiful – we wish you all the happiness in the world,” one fan commented.

“You have wonderful role models for a long happy marriage together 💕sincere Congratulations 🎉 to you Rob Farnham and Mel,” another said.

“So beautiful and happy for you Rob and Mel. Congratulations wishing you love and happiness,” a third wrote.

“Congratulations to you both 💕 wishing you lots of happiness. Wonderful news which the family needed,” a fourth shared.

It comes after Robert and James provided an update on their father’s health in October, thanking fans for their “amazing messages” and revealing that Farnham “got teary” when he heard about the support.

“We thank everyone who took the time to write a lot of these amazing messages to us,” Robert told A Current Affair.

“It was kind of comforting to know that Australia was behind him,” James added.

“I know that he appreciated that.

“I remember when we first told him, he got teary.

“He never expected everyone to still love him.

“It was nice for him to hear that, thank you everyone.”

Image: Facebook

This article first appeared on OverSixty.