Solskjaer, who spent 11 years as a player at Old Trafford, was recently announced as United’s next permanent manager.
The Norwegian has impressed as caretaker boss since taking over following the sacking of Jose Mourinho in December.
He has lost just one Premier League game and got Manchester United competing again for a top four position.
But sources now report that Solskjaer was a fan of United’s bitter rivals Liverpool when growing up.
They claim that it is well known in Solskjaer’s hometown of Kristiansund in Norway.
The revelation comes despite Solskjaer regularly describing his love for Manchester United.
When taking the United job, he said: “Manchester United is in my heart and it’s brilliant to be coming back in this role.
“I’m really looking forward to working with the very talented squad we have, the staff and everyone at the club.”
Liverpool are currently top of the Premier League, 18 points ahead of Solskjaer’s United.
And former Red Devils star Gary Neville has spoken out on what Solskjaer needs to close the gap.
“Over the last six or seven years, United have put £700m into that squad, and they’re still falling well short of where Liverpool and Manchester City are at the moment – they’re 16-18 points behind,” Neville said.
“So what you have to look at is how United bridge that gap, and yes they will do that through the spirit that Solskjaer has created, but they have to get better players on the pitch that can compete with Liverpool and City to go along with some of the very good players they’ve already got.
“United have a big, big job.
“There are four or five players that Solskjaer will want to keep that are out of contract and he needs to tie down.
“There are four or five players he will need to bring in, and there are probably four or five players that he needs to get out.”