Two presidential candidates are breathing a sigh of relief tonight, but one of them you've never heard of.

First up, Kentucky Sen. Rand Paul will appear on the main stage at Thursday night's Fox News Channel debate in Des Moines after being pushed off because of low poll numbers and demoted to the undercard debate in Charleston earlier this month – an opportunity he decided to boycott.

Additionally, former Virginia Gov. Jim Gilmore, who has been running for president since July, was finally let back into a debate, participating in the earlier kids' table debate.

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Rand Paul will be allowed to sit at the big kids table on Thursday when Republicans debate one final time in Iowa before the state's caucuses on Monday

Earlier this month, Republicans gathered for a Fox Business Network debate in Charleston, South Carolina, but Rand Paul and Carly Fiorina were ushered to the kids table

Jim Gilmore, the former governor of Virginia who has been running for president since July, will participate in his second debate this week. He'll line up in the undercard with Carly Fiorina, Rick Santorum and Mike Huckabee

Joining Paul, who will be standing at one of the side podiums because his poll numbers still aren't great, would be frontrunner Donald Trump, who would be standing front and center.

Trump's campaign manager said tonight that he will 'definitely not' participate in the debate over concerns about Megyn Kelly

Ted Cruz, Marco Rubio, Ben Carson, Jeb Bush, Chris Christie, John Kasich and then Paul are expected to attend.

Gilmore will be joined by Carly Fiorina, who made the main debate stage after the first Fox News debate, but then was demoted earlier this month back to the kids' table.

Additionally, Rick Santorum and Mike Huckabee, who both won the Iowa caucuses in previous cycles, will join Fiorina and Gilmore.

With the Iowa caucuses just six days away, the era of the junior varsity debate could be coming to an end.

In December, Rand Paul (far right) and Carly Fiorina (second from left) both made the main stage when the Republican debated in Las Vegas, Nevada, but by January they both got the boot

After Iowa, and then New Hampshire, a week later, the crowded GOP field will probably, finally, thin out, with political losers throwing their support to the candidates that placed in the top three or four in either state.

This week already, George Pataki, who got stuck in the undercard debate time after time, announced that he would be supporting Rubio.

While another former hopeful, Rick Perry, said he was behind fellow Texas, Ted Cruz.

Thursday's debate was supposed to feature a rematch between Trump and Fox News host Megyn Kelly, who was once again chosen to moderate.

Trump had been making a stink about Kelly, even offering supporters a chance to vote yes or no on whether he should even show up to the debate because the 'biased' journalist will be there with him.

Fox News has snarked back and defended Kelly, mocking Trump for throwing decisions to his Twitter following.