The Only Way Is Essex sisters Sam and Billie Faiers wrote to a judge to try to save their stepfather from prison.
But their plea did not stop an Old Bailey judge jailing David Chatwood for the equivalent of four years.
He pleaded guilty to conspiracy to steal £1 million-worth of gold and silver bullion from a lorry in Belgium in October last year.
Judge Richard Hone said he had read a letter from Chatwood, 58, and "also a letter from his daughters who find him helpful in their shops".
But this would not alter his sentence because Chatwood was a principal organiser of the theft.
The boutique-owning television sisters, along with Sam's boyfriend Joey Essex, waved from the public gallery with their mother Sue Wells as Chatwood was led away.
Judge Hone said that with time served since pleading guilty in April, Chatwood would serve two years and nine months.
He had been recalled to prison because he was on licence from a 2001 sentence of 12 years for drugs and firearms offences.