Katy smoulders in the black and white photo, as she seductively lays on the couch behind John while draping her arms around him. Meanwhile, John, 36, sits on the floor strumming his guitar.
John unveiled the artwork on his Twitter account last night, (2 December) which marks the couple's first portrait together.
John also took the opportunity to gush about Katy. Captioning the image, he said: "Proud of this song, proud of this artwork, proud of this girl - JM."
Taking to his website, John added: "I'm excited to give you the first look at the single artwork for 'Who You Love', shot by the great Mario Sorrenti. And yes, we look like this at home pretty much all the time."
The couple, who have been dating on and off since summer last year, co-wrote 'Who You Love' for John's current album Paradise Valley.
Meanwhile, 'Roar' singer Katy is gearing up for her return to the UK this weekend, as she headlines the first night of the Capital FM Jingle Bell Ball at London's O2 arena. She will also be performing during the X Factor final later this month.
Listen to the audio version of 'Who You Love' in the video below: