Gogglebox star Grant Jackson is about to become a grandfather... at just 36.

Gogglebox‘s famous Jackson family may need to invest in another lounge suite after this announcement. Grant Jackson, 36, told New Idea his eldest son Corey, 18, is expecting his first child with fiancee Taya.

The father-of-six told the publication he and wife Stacey were stunned at the news. “Corey took us aside and said he had to talk to us about something… our very first reaction was probably shock,” he said.

Stacey said she was pleasantly surprised by the thought of welcoming a grandchild into the world.

"It was after that moment I had this feeling of love for this little person I hadn't met yet but who was going to make a very special addition to our family's lives," she said.

A photo posted by The Jacksons (@thejacksonsau) on Sep 3, 2016 at 4:56pm PDT

The father of six said he wanted to shield his son from the difficulty of young parenthood.

"It was hard having a baby young, and I didn't want it to be as hard for them as it was for us," he said.

Corey shared the happy news on Facebook in late June.

A further post in late July revealed the couple were expecting a baby girl.

"Taya and I are excited to announce it's a baby girl," the post read.

The arrival date is expected to fall in December.

* Feature image via Facebook/Network 10.