19 Kids and Counting star Jessa Duggar clearly adores her little sister and BFF Jinger, and one of her latest Instagram posts (@jessaseewald) is proof of the sisters' strong relationship.

The adorable throwback photo shows a collage of old photos, with a younger Jessa and Jinger hamming it up in front of the camera, sharing a tight hug, strolling hand in hand, and riding a toy car together.

"Jinger and I – 20 years ago! Still #BFFs to this day! Love you, little sis!" she captioned.

Photos of Jinger are always present in Jessa's Instagram account. Just a month ago, she posted a picture of a smiling Jinger wearing a red top and a beanie and shared birthday greetings with her. "Happy golden birthday to my sweet sister Jinger! I love you so much!" wrote Jessa.

According to the Duggar Family blog, Jessa and Jinger have often been mistaken as twins even though they are born 13 months apart. However, some people beg to differ. Someone said that she "definitely wouldn't mistake them for identical twins, but maybe fraternal twins."

While they might share the same features, the two sisters' personalities could not be more different. The family said that Jinger is a photography freak and handles their personal album and website. Jessa for her part loves to teach and spend her days homeschooling the younger Duggars.

"Jessa is pretty matter-of-fact. She has an opinion, she'll tell you, in a nice way," said Jinger. The same consideration for feelings seems to be shared by Jinger too. "Jinger doesn't want to hurt anybody's feelings," said Jessa. "Our personalities just kind of click."