Warner married for the first time in New York City in 1971, Simone Georgina de Ferranti (Née Nangle), who gave him a stepdaughter and two sons of his own, one of whom is TV chef Valentine Warner.
In 1971, Warner tied the knot with Simone Georgina de Ferranti (formerly known as Nangle) in New York City. This union resulted in her becoming his stepmother to his two sons, one of whom is celebrated television chef Valentine Warner.