Back in April 2017, many members of the LGBT+ community were shocked to learn that Caitlyn Jenner had voted for Donald Trump in the 2016 election.

Defending her decision, the retired Olympic gold medal-winning decathlete insisted her loyalty was with both the Republican party and her community, and claimed she would continue to fight for transgender people, while also sticking to her own political beliefs.

However, in a dramatic turn of events, on Thursday the transgender celebrity admitted she'd been wrong to vote for the former reality TV star.

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Writing an opinion piece in The Washington Post, Jenner hit out at the controversial Republican president, declaring he had insulted the transgender community's dignity.

The 68-year-old wrote: "He has ignored our humanity. He has insulted our dignity. He has made trans people into political pawns as he whips up animus against us in an attempt to energize the most right-wing segment of his party."

Having previously expressed hopes of working with Trump and Republican policymakers, the father-of-six confessed she was mistaken, putting: "Sadly, I was wrong. The reality is that the trans community is being relentlessly attacked by this president."

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Jenner, who is rumoured to be in a relationship with transgender model, Sophia Hutchins, continued: "It is unacceptable, it is upsetting, and it has deeply, personally hurt me. It's clear these policies have come directly from Trump. I cannot support anyone who is working against our community. I do not support Trump. I must learn from my mistakes and move forward."

In her piece, the famed athlete said she now knows she needs to listen and learn from more members of the transgender community in the future.

"I am more determined than ever to find the best way to bring trans issues to the fore of our social and political conversation, domestically and abroad," she wrote. "I need to better use my voice, my privilege and my foundation to advocate for and support our community."

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Her rejection of President Trump comes after a report this week alleged that the former billionaire businessman's administration was aiming to create a narrow definition of gender by law.

According to The New York Times, under the proposal, 'gender' would mean being only male or female and would be unchangeable once it is determined at birth.

After the newspaper claimed that the Department of Health and Human Services was circulating a memo proposing that gender be defined as an "immutable biological condition determined by a person's sex organs at birth", Jenner bit back.

In a statement given to People, she said: "The Trump administration has ferociously attacked my community again. Just as an FYI Mr. President— the military is the single largest employer of trans people in the world. This leaked memo is an unacceptable attack on my community. We will not be erased!"

The father-of-six's opinion piece is likely to please many members of the transgender community who felt betrayed in the election. Only two months ago, Jenner was ambushed by a trans woman over her support for Trump.

Caitlyn Jenner says she was 'wrong' to believe Trump would help LGBTQ people