"We're super happy, really happy."
She continued, "We just want to keep our private life to ourselves."
"I think I've managed to find the place where I am really happy. It just took me a minute."
The pair went public last May, after they posted a black and white photo on Instagram.
“Without music, life would be a mistake,” both wrote, referencing Friedrich Nietzsche.
Johns, 38, was previously married to Natalie Imbruglia.
Meanwhile, the model - who made headlines when she was arrested in Bali back in 2005, serving 3 months in jail for having 2 ecstasy tablets, was once married to Adam Zammit.