The Sugababes singer announced the happy news to Hello! magazine, saying she's due in January.
"It has been a big year for us," said Range.
"We moved into our house at Easter after spending two years renovating it and we think that was the same weekend we conceived. It was like it was meant to be. It was so special that it happened in our first family house together."
Range, 34, tied the knot with Partakis in a fairy tale Italian wedding last September.