To celebrate the "Aquaman" star's 42nd birthday on Sunday, August 1, Kravitz posted a photo to Instagram of the two stars with their arms around each other. Kravitz and Lisa Bonet ended their marriage in 1993, and the 53-year-old "A Different World" actress tied the knot with Momoa in 2017 after dating since 2005.
"Happy Birthday, @prideofgypsies," Kravitz, 57, wrote in the caption. "I'm proud to call you my brother. One love. One family."
Momoa proved that the affection is definitely mutual by sharing in the comments section, "love u madly. mahalo nui loa [two heart emojis]." The actor also reposted the pic to his Instagram Story.
Among the celebs expressing joy in response to the post was Holly Robinson Peete, who wrote, "You two [two heart emojis]." Also, Alex Rodriguez responded to the post with three fire emojis.
On Saturday, July 31, Momoa celebrated his final day of 41 with an Instagram message that read in part, "42 here we go craziest year to date. all ALOHA to you and yours J."
Kravitz, who shares adult daughter Zoë Kravitz with Bonet, has previously discussed the public's fascination over his close friendship with Momoa. The "Game of Thrones" alum and Bonet, who dated for more than 10 years prior to their surprise 2017 nuptials, share children Lola Iolani, 13, and Nakoa-Wolf, 12.
"People can't believe how tight Jason and I are, or how tight I still am with Zoë's mom, how we all relate," the "Fly Away" rocker said in the November 2020 issue of Men's Health. "We just do it because that's what you do. You let love rule, right?"
At the time, he also recalled how natural his initial introduction to Momoa has been. "Literally the moment we met, we were like, 'Oh, yeah. I love this dude,'" Kravitz shared.