The "Fly Away" rocker recently opened up for a profile in the U.K. publication The Times, where he reflected on his "beautiful" relationship with his ex's family.
"We took the time so that we could become best friends again," Kravitz explained, recalling how he made a concerted effort to reconnect and rebuild his friendship with Bonet after their divorce was finalized in 1993.
"Our families are blended. I love her husband -- he's like a brother to me -- and I love the kids," Kravitz said of the Aquaman star. "It’s beautiful, but it takes work."
Kravitz and Bonet share one daughter, 30-year-old actress Zoe Kravitz. Bonet and Momoa, who have been romantically linked since 2005, share two kids -- 11-year-old Lola, who turns 12 on Tuesday, and 10-year-old Nakoa-Wolf.
Kravitz and Momoa have been very open about their friendship over the years, and were recently spotted hanging out and bonding at Zoe's wedding to Karl Glusman late last month at the rocker's home in France.
"Lenny was thrilled his daughter decided to have her wedding at his home in Paris. He was gushing about how happy he was she had found the love of her life, and how proud he was of all her incredible accomplishments," a source told ET following the star-studded celebration. "During the party, the champagne flowed and Lenny and Jason, who are good friends, chatted and both agreed they loved Karl."