The brothers say they couldn't be more proud of their father as he transitions from male to female

By Adam Carlson
Updated April 25, 2015 03:20 PM
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Credit: Chelsea Lauren/WireImage

Bruce Jenner‘s sons Brandon and Brody have joined their dad’s growing chorus of supporters.

Two of his three sons posted messages of support for their father on Instagram following his announcement on 20/20 Friday that he is transitioning from male to female.

“You won another gold tonight. I stand with you on this journey. I love you Dad,” Brody, 31, wrote in an Instagram post early Saturday.

Brody’s older brother Brandon, 33, posted his own photo to Instagram on Friday as well – captioning a black-and-white photo of him riding on his dad’s shoulders as a little boy with “Proud son.”

Bruce’s two eldest children, son Burt and daughter Cassandra, appeared with Brandon and Brody during the 20/20 interview to support their dad. Bruce’s youngest daughters, Kylie and Kendall, ex-wife Kris Jenner and his four Kardashian step-children have all also voiced their support.

Bruce, 65, told Diane Sawyer during the interview that he’d been “terrified” to tell his kids about his transition.

“Every single one of them,” he said. “I can’t let myself hurt them. How do I do this and not hurt my children?”

But, Brandon said during his appearance, “I feel like I’m getting an upgraded version of my dad, of a parent.”