During a conversation with Patsy Kensit, to air on tonight's show, the son of late footballer George reveals he decided not to follow in his father's famous footsteps.
Calum tells Patsy he had the chance to train with Portsmouth Football Club but opted to fly to Milan instead to pursue modelling.
He tells the ex-Emmerdale actress that his dad didn't teach him much about football or play the game with him often.
"A lot of the times he would kick the ball to me, it was set up for pictures," says Calum.
Calum also speaks about his father's death following a prolonged and well-publicised battle with alcohol addiction. He says his father's struggles never changed his own opinion about alcohol.
"For every great story, there is a dark side that comes with it," he says.
Celebrity Big Brother viewers saw Calum speak about his father on last night's episode after Ken Morley quizzed him on his inheritance.
After Calum revealed in a task that he'd undergone three hair transplants, Ken, 71, asked if he'd burned through his inheritance doing that.
Calum was quick to reply that he'd got no inheritance from his father, the only thing he'd received from George was a "lovely name and a great legacy."
Ken has now been removed from the house, in scenes that will air tonight.
A statement from CBB bosses today read: "Ken Morley has been removed from the Celebrity Big Brother house for using unacceptable and offensive language following his formal warning.
"Tuesday's eviction is now cancelled and lines are now closed. Anyone who has already voted will be able to apply for a full refund and details will be available on the Big Brother website within 24 hours."
Ken had been facing elimination in the first public vote of the series against model Chloe Goodman and US singer Alexander O'Neal.
CBB continues tonight at 9pm on Channel 5.
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