K-pop singer Gain and bride-to-be supermodel Jang Yoon-ju shared photos taken together on their Instagram on Tuesday, a month before Jang's wedding.

Jang, a television personality and one of Korea's most successful fashion models, is scheduled to walk down the aisle on May 29 with her businessman fiancee, who is four years younger than her.

Supermodel Jang Yoon-ju poses with singer Gain (top) and actress Lee Ha-na (bottom). (Jang Yoon-ju's Instagram)

Gain, both a solo artist and a member of K-pop group Brown Eyed Girls, wished Jang well on her wedding in the photo caption. The two are said to be close friends.

Jang also wrote, "Gain and I share a taste in smoky eye makeup."

K-pop singer Gain (right) poses with bride-to-be supermodel Jang Yoon-ju. (Gain's Instagram)

The 34-year-old model also shared a photo with actress Lee Ha-na, with whom she said she shares "similar musical tastes."

Jang currently features on the cover of fashion magazine Allure Korea's May issue in a bridal-themed photo shoot that also features other top Korean models.

By Yoon Sarah (sarah356@heraldcorp.com)