Goldsmith, 52, who is currently undergoing a weight-loss challenge to raise money for the Opera Global Youth Foundation, opened up about his sister’s influence on her daughters when it comes to staying slim. And he admits one of the elements that inspired his own efforts to lose weight is the comparisons between him and his family.
“A few years back someone asked me why I was super-sized when my family [is] so slim?” he wrote on his blog. “‘Charming,’ I thought, but it did strike a chord.”
He says his sister has always had good habits when it comes to nutrition and exercise, and that it’s something she has passed along to her daughters — especially fitness fanatic Pippa! Goldsmith adds that Carole — who, at 62, is 10 years older than he is — looks “phenomenal” for her age.
“The family they were referring to was obviously my sister Carole Middleton and my nieces Kate and Pippa,” he said. “Carole has always looked after herself and eaten healthily and she has a stunning figure and that mentality of considering your diet and exercise is evident in the girls also.”
This article originally appeared on PEOPLE