Nick Jonas Sends His Brother Joe Jonas a Sweet, Punny Birthday Message: You've 'Always Got My Back'

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We already know that #SquadGoals and #RelationshipGoals exist, but maybe it's time we made #SiblingGoals a thing.

Nick Jonas took to Instagram on Saturday to wish his big brother, Joe Jonas, a very happy birthday. He shared a photo of the two hanging out on the deck of a boat in the Hudson River -- apropos for two New Jersey natives.

WATCH: Joe Jonas' Surprise Birthday Party was Epic

"Happy 26th birthday to this guy," Nick wrote. "Always got my back. Always there for me. My best friend. Love you bro."

See how we only get a glimpse of the "Jealous" singer's back? Clever, Nick. Clever. But way to photobomb the JoBros, Lady Liberty...

Joe's girlfriend, Gigi Hadid, posted a sweet message as well, sharing a cute photo of the two at midnight, just as Joe was turning 26.

Both Nick, 22, and Gigi, 20, helped Joe celebrate earlier this week when they threw the singer a surprise birthday party on Monday.

WATCH: Nick Jonas Transforms His Body for Kingdom

If you weren't jealous of Joe before, you probably will be now -- a ton of his famous friends, including his ex Taylor Swift and Nick's rumored girlfriend Kendall Jenner -- got together to play a match against the L.A. Galaxy soccer team.

Goals forever.