Transgender celebrity Caitlyn Jenner will be in Cleveland during the Republican National Convention, as a guest at the Big Tent Brunch, hosted by pro-LGBT conservative group the American Unity Fund.

Jenner, who tweeted that she 'can't wait to hit the road to Cleveland', is attending the brunch to call for more support for LGBT rights across both Republican and Democratic parties.

She is a fervent Republican and supporter of Donald Trump, but hasn't revealed whether she will be attending or speaking at the Convention at the Quicken Loans Arena.

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Transgender celebrity Caitlyn Jenner will be in Cleveland during the Republican National Convention, as a guest at the Big Tent Brunch, hosted by pro-LGBT conservative group the American Unity Fund

She told The Daily Beast: 'The party conventions are like the political Olympics, and I'm excited to be headed to Cleveland to stand with my fellow LGBT Republicans and allies.

'As a proud Republican and transgender woman, I want to support courageous Republicans who advocate for LGBT freedom. Our country's non-discrimination laws must be updated and this cannot be achieved without bipartisan support.'

Her announcement comes as the GOP struggles to calibrate its position on LGBT rights.

Officials have rejected an emotional plea to back off the party's opposition to same-sex marriage, renewing the party's embrace of religious conservative values.

Republicans who gathered Monday to shape their party platform in Cleveland also refused to reverse their opposition to bathroom choice for transgender people, exposing a rift with their presumptive presidential nominee - despite internal warnings that social conservative policies on gay rights alienate voters.

'All I ask today is that you include me,' said Rachel Huff, a Republican delegate from Washington, D.C., who is openly gay.

Jenner, who tweeted that she 'can't wait to hit the road to Cleveland', is attending a brunch to call for more support for LGBT rights across both Republican and Democratic parties

'If our party wants a future ... we must evolve,' she said, her voice cracking with emotion.

Asked to respond to Huff, Oklahoma Gov. Mary Fallin later explained that opposition to same-sex marriage has 'been the longtime tradition of the Republican Party.'

'She's still welcome in the party. Everyone is,' Fallin said.

Anxious conservatives are trying to influence the direction of a party facing deep uncertainty about Trump's positions on social issues.

Delegates will adopt an updated set of policy prescriptions - known as the party platform - when the Republican National Convention begins next week. Delegates began the tedious process of updating the 62-page document this week. Changes adopted so far signaled renewed support for religious conservative values.

The New York billionaire has been reluctant to embrace social conservative positions in some cases, particularly as Republicans across the country push for new restrictions on bathroom access for transgender people.

Trump, who claims strong support from the gay community, has told Jenner to use whichever bathroom in Trump Tower she'd like. He also said North Carolina's so-called 'bathroom law,' which directs transgender people to use the bathroom that matches the gender on their birth certificates, has caused unnecessary strife.

Trump, who claims strong support from the gay community, has told Jenner to use whichever bathroom in Trump Tower she'd like. He also said North Carolina's so-called 'bathroom law,' which directs transgender people to use the bathroom that matches the gender on their birth certificates, has caused unnecessary strife

Yet Republicans on Monday let stand language that attacks the Obama administration for directing schools to allow transgender students to use restrooms and other facilities that match their gender identities. 'Their edict to the states concerning restrooms, locker rooms and other facilities is at once illegal, dangerous and ignores privacy issues. We salute the several states which have filed suit against it,' reads the platform.

Delegates also changed language that offers a warning to children of same-sex parents: 'Children raised in a traditional two-parent household tend to be physically and emotionally healthier, less likely to sue drugs and alcohol, engage in crime or become pregnant outside of marriage.'

Annie Dickerson, a Republican delegate from New York, said the change relied upon 'outrageous, horrible evidence' and represented 'another poke in the eye to the gay community.'

'Stop repelling gays for God's sake,' she declared.

Trump opposes same-sex marriage, but often avoids discussing conservative social issues on the campaign trail. Facing the possibility of a delegate rebellion at the convention next week, his campaign has been taking a hands-off approach to the platform debate.

Wyoming Sen. John Barrasso, who led the platform committee, said he was given Trump's blessing during a private meeting last week in Washington.