Lorde's parents have married.
Lorde, whose real name is Ella Yelich-O'Connor, tweeted in 2014 that her parents had become engaged after almost 30 years together.
Her father Vic O'Connor, an engineer, proposed to her mother Sonja Yelich, a poet, at Niagara Falls. The couple have four children.
On Saturday Sonja Yelich tweeted "today at 10am we got married".
She has released pictures showing the couple holding hands and kissing on a beach, champaign glasses in hand. They are both wearing black suits, white tops and sunglasses.
Lorde has been in New Zealand this week for the graduation of her sister Jerry Yelich-O'Connor.
On Wednesday night Sonja Yelich posted a video of Lorde lifting up Jerry in graduation robes in front of the Albert Park fountain in Auckland.
"Sooooo proud! [Jerry] graduated today from the University of Auckland with a [Bachelor of Commerce and Bachelor of Arts] conjoint," Yelich posted on Instagram.
Lorde shot to fame with her hit single Royals in 2013, which won a Grammy Award.
She has revealed two new songs from her upcoming album Melodrama to great acclaim.