Noah Cyrus and Franklin Jonas are making sure they’ll always remember their friendship.

Indeed, Miley Cyrus’ younger sister and Kevin Jonas, Joe Jonas and Nick Jonas‘ little brother revealed they got matching tattoos of their characters from Ponyo on their left forearms, celebrating when they worked together on the 2008 film as children.

And Noah and Franklin—who were the English voice actors of Ponyo and Sosuke, respectively, in the Studio Ghibli animated movie—shared an inside look into their fun-filled ink session in a joint May 29 Instagram post.

The carousel featured a series of black-and-white photos of the longtime friends as they got tattooed together by artist Zander Morales in a poolside backyard. Noah, 26, and Franklin, 25, were all smiles as they showed off their new ink, which featured a sweet illustration of Ponyo and Sosuke nose-to-nose.

And Noah expressed her love for Franklin by sharing a heartfelt reference to the Hayao Miyazaki film in the post’s caption, writing in Japanese, per a translation, “I love you, Sosuke,” while also adding a handful of sea-themed emojis.