Tragic actor Paul Walker's generosity will never be forgotten by one California jewellery store employee, who reveals he once secretly purchased an engagement ring for a U.S. soldier to give to his girlfriend.

Irene King, who was a sales associate at Bailey Banks and Biddle Jewelers in Santa Barbara, California claims The Fast and the Furious star anonymously bought a $10,000 (Gbp6,600) sparkler for an Iraq War veteran who could not afford it.

She tells CBS Los Angeles, "She (girlfriend) saw something that she really, really liked but he said, 'Honey, I can't afford that'."

After overhearing the conversation, Walker reportedly called the manager over and asked him to put the rin "on my tab".

King says, "To do something like that for a perfect stranger is just unbelievable."

Walker perished in a fiery car crash on Saturday (30Nov13) in California after the 2005 Porsche Carrera Gt his friend Roger Rodas was driving slammed into a tree and exploded.