The 30-year-old Premier League footballer and the 29-year-old pop star welcomed two babies into the world on August 16.
Leigh-Anne announced the birth of her "two miracle" children to her 7.3 million followers on her Instagram account.
Posting an adorable black and white snap of the two tots' tiny toes and feet on the social media platform, she captioned the post: "We asked for a miracle, we were given two ... Our Cubbies are here 16/08/21"
Leigh-Anne's Little Mix bandmate Perrie Edwards gave birth to her first child with Liverpool FC soccer player Alex Oxlade-Chamberlain on August 21.
In a post on her Instagram account on Sunday (22.08.21), Perrie shared a black and white photo of her baby, which was captioned: "Welcome to the world baby 21/08/21."
Andre and Leigh-Anne got engaged in May 2020, with the sportsman getting down on one knee after setting up an outdoor cinema with a walkway of fairy lights and candles.
Talking about the proposal, the 'Touch' hitmaker said: "[Andre] basically set up this outdoor cinema, so there was a walkway of fairy lights and candles and I was like, 'this is a bit much for an anniversary, what's going on here?"