"Happy birthday big bro," he wrote. "I miss you and love you man. @kevinjonas."
Nick's wife, Priyanka Chopra-Jonas, also greeted her brother-in-law via her Instagram Story, sharing a picture of him cuddling with his two daughters with his wife, Danielle -- 6-year-old Alena and 4-year-old Valentina.
"Happy birthday to this rad dad," she wrote. "Lots of love @kevinjonas!"
As for the youngest Jonas brother, 20-year-old Frankie, he shared a sweet throwback picture of Kevin pushing him on a swing as a toddler.
"Love you dude. Happy birthday @kevinjonas you’re such an inspiring father and brother," he wrote. "I’m so grateful for how close we’ve gotten. I can’t wait for all the blessings in your future."