Sean Lennon is a singer, songwriter and occasional actor
John Lennon's son Sean has defended the decision to license footage of his father for use in a car advert.
The advert for French firm Citroen sees the former Beatle ponder on "copying the past" and "looking backwards".
Writing on micro-blogging site Twitter, Sean Lennon said the ad was "not for money" but was intended to keep his father "out there in the world".
"Having just seen [the] ad I realize why people are mad," he wrote. "But [the] intention was not financial."
Many have criticised Lennon's widow Yoko Ono for allowing the interview footage to be linked to a commercial product.
But her 34-year-old son defended his mother, saying she was merely "hoping to keep dad in [the] public consciousness".
The ad, he said, meant "exposure to [the] young". "Not many things as effective as TV," he continued.
When the advertisement for the Citroen DS3 was launched, the car company said Lennon had been chosen for his "universal, timeless and iconic status".
The ad was first broadcast on 14 February on ITV1.