They're both expecting their first child, announcing they were pregnant just six days apart.
In a behind-the-scenes snap from the shoot for Kiss My Uh Oh, the singers can be seen with their blossoming stomachs on full display while they pose with bandmate Jade Thirlwall, 28, and singer Anne-Marie, 30.
Bumping along! Little Mix's pregnant Leigh-Anne Pinnock and Perrie Edwards have showcased their growing stomachs in behind-the-scenes snap from new music video Kiss My Uh OhInsurance Loans Mortgage Attorney Credit Lawyer
Leigh-Anne highlighted her bump in a tight beige skirt which completely covered her belly and was styled with a polka-dot white shirt and bright pink cardigan.
The mum-to-be wore her locks down, letting them cascade over one shoulder, and held onto a colourful handbag for the snap.
Perrie was also glowing in the image, with her bump being dressed in a skin-tight white T-shirt and black leggings.
She added a leopard print cardigan to her costume for the fun video and ensured to showcase her growing bump by standing slightly to the side.
Glimpses: The singers had teased a look at their growing stomachs in the fun music video, with them wearing the colourful costumes in the opening scene which was inspired by Bridesmaids
Joining the stars in the picture, Jade sported baggy trousers with a pale blue shirt tucked in and accessorised with a flat cap and neck pillow.
This costume was inspired by Melissa McCarthy's look in Bridesmaids, with much of the video recreating famous scenes from the hit movie.
While singer Anne-Marie, who Little Mix have collaborated with on the track, looked stylish in a black and white striped crop top and high-waisted jeans.
The stunning quartet released the music video for Kiss My Uh Oh on Friday.Insurance Loans Mortgage Attorney Credit Lawyer
Expecting! Stunning Leigh-Anne and Perrie's bumps were also seen as they walked into a pink hotel room in the clip, with singer Anne-Marie leading the way
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Filled with fun and laughter, the video recreates scenes from the 2011 movie, which told the story of Annie (Kristen Wiig) who falls out with bridesmaid Helen (Rose Byrne) while acting as Maid of Honour for her childhood pal Lillian (Maya Rudolph).