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Texas Gov. Rick Perry will make his first campaign appearance on behalf of Mitt Romney Friday in Nevada, ABC News has learned.

Perry will appear at the opening of the Romney campaign's field office in Elko, Nevada, on Friday. Romney will not be in attendance.

Perry, who dropped his own presidential bid and threw his initial backing behind Newt Gingrich just two days before the South Carolina primary, endorsed Romney in late April but has yet to publicly campaign for his one-time rival.

In late May, Perry and Romney held a joint conference call with the Texas governor's top donors, urging his network to raise money for the former Massachusetts governor. First lady of Texas Anita Perry attended a fundraiser with Ann Romney in Texas in May as well.

Nevada was home to one of Perry and Romney's most heated exchanges last fall. During a CNN debate in Las Vegas in October, Perry accused Romney of hiring illegal immigrants to landscape his home, and Romney claimed that illegal immigration had increased 60 percent in Texas.

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