The Girls Aloud singer, who has starred in a number of films during the band's hiatus, is said to be spending time in the recording studio with singer-songwriter Luciana, who rose to fame featuring on the 2006 Bodyrox song 'Yeah Yeah'.
"I'm actually writing with Sarah Harding at the moment from Girls Aloud," Luciana told Pop Trash Addicts.
"She's down the studio. And she's lovely. A good time girl. She's got a great voice and we're just writing some tracks together.
"And when we go to America we're gonna do some stuff with Nicole Scherzinger."
The news comes after Harding's boyfriend Tom Crane admitted that he was missing her because "she's busy recording in the studio".