Two have maintained a close relationship over the years.
Taylor Swift wished her younger brother a happy birthday the best way she knows how: by posting an adorable throwback photo of the two showing off their biggest smiles to the camera.

“Happy birthday Austin!!!!! Thanks for 24 years of LOLs,” the Grammy-winning singer wrote.

Austin and Taylor have maintained their close sibling bond throughout the years, and in fact, the brother and sister duo recently hit up the Vanity Fair Oscars after party together with Lorde.

The three posed for an official photograph by Mark Seliger and T.Swift posted the shot on Instagram, writing, “I feel like we achieved our goal of looking like we’re in a new primetime drama series called Family Secrets.”

Meanwhile, Lorde captioned the same image, “The Dreamers, last night at @vanityfair.”

The Swift family recently got together in Florida to celebrate Austin and Taylor’s dad, Scott Kingsley Swift, on his 64th birthday on March 5.Looks like March is a big month for the Swift family!

So without further ado, happy birthday, Austin!