Ashley Graham models swimwear with her little sister

The supermodel has enlisted her younger sibling Abigail to help her promote her Summer 2019 swimwear collection for the size-inclusive brand Swimsuits For All.

The nine-piece series spans bikinis, monokinis and one pieces with details including mesh panels, netting, florals and animal prints.

The campaign sees the duo posing together on the beaches of Punta Cana for the photographer Ben Watts, and also incorporates old family photos and home videos capturing the sisters' bond, tracking their relationship all the way back to childhood.

"Despite our six-year age difference and busy lifestyles, my little sister and I have always been strong presences in each other's lives," said Graham in a statement. "We've shared countless memories together and going through our childhood photos was a trip down memory lane. Abigail has always been my rock, and I was honored to have her by my side during this photoshoot. Plus, she's a new mom and has never looked hotter in a swimsuit!"

"I love to support Ashley in everything she does, especially when it comes to promoting her message of beauty beyond size," added Abigail. "I'll forever be grateful for the sisterly love we have for one another and will never forget the special moments we shared during the photoshoot in Punta Cana."

This isn't the first time Graham, who has a longstanding partnership with Swimsuits For All, has turned to family to help model her swimwear designs: last year the model modelled pieces for her Resort 2018 collection alongside her mom Linda.