It's believed they've been dating since 2016 and are now living together.
And New Zealand pop star Lorde, 22, appeared in high spirits with her boyfriend Justin Warren, 33, in her home city of Auckland on Sunday.
The Royals star and her partner-of-three-years, who works as a promotions director for Universal Music, were seen buying homewares.
Is Lorde secretly engaged? The Royals star, 22, flashed a ring on her wedding finger while shopping for homewares with her boyfriend Justin Warren, 33, in Auckland on Sunday
Lorde, whose real name is Ella Marija Lani Yelich-O'Connor, was seen carrying an assortment of Persian rugs.
The couple looked casual and comfortable as they loaded several luxury items into their car.
Despite regular public displays of affection, Lorde and Justin have never officially announced they are together.
Taking the next step? Believed to be living together, the Royals singer and her 'beau' Justin were seen carrying home decor items to spruce up their interiors
Looking like the picture-perfect couple, the pair were dressed in matching laid-back ensembles.
Lorde paired a silk maxi skirt and white T-shirt with comfortable black Birkenstocks.
The Royals singer wore her brunette locks up in a bun, and wore stylish aviator shades over her minimal makeup application.
The Auckland-born songstress was also seen wearing a ring on her left hand - in place of an engagement ring.
It's unclear whether the ring was particularly special between the pair, as Lorde has worn rings on that finger in the past.
