Cristiano Ronaldo was reduced tears after being shown footage of his late father during a television interview on Thursday.
The Juventus and Portugal star was shown a clip of Jose Dinis Aveiro, who was an alcoholic and died of liver failure in 2005 at the age of 52, speaking about his son on his doorstep during an hour-long chat with Piers Morgan.
Ronaldo, crying, said: 'I never saw the video. I never saw that video. Unbelievable.'
Cristiano Ronaldo broke down in tears during an interview with Piers Morgan on Thursday
The Juventus star was overcome with emotion after seeing new footage of his late father
Asked how it felt to hear his father talking of his pride at his son's achievements, the former Manchester United and Real Madrid player added: 'Yes, a lot.
'I think the interview would be funny, but I didn't expect to cry. But I never saw these images. I don't know where you... I have to have these images to show my family.
'But I really don't know my father 100 per cent. He was a drunk person.
Jose Dinis Aveiro was an alcoholic and died of liver failure at the age of 52 in 2005
'I never spoke with him, like a normal conversation. It was hard.'
Ronaldo was just 20 when his father passed away, meaning he missed many of the biggest moments of his football career.
These include winning five Champions League titles and five Ballon d'Ors as well as leading his country to Euro 2016 and Nations League glory.
The 34-year-old father of four said: 'My family see, my mum, my brothers, even my old son, but my father, he didn't see nothing, and it was... he died young.'
Ronaldo also revealed he plans to marry his girlfriend Georgina Rodriguez one day, but not just yet.
He said: 'We'll be (married) one day, for sure. It's my mum's dream as well. So, one day. Why not?'
Cristiano Ronaldo Meets Piers Morgan airs Tuesday at 9pm on ITV.