Washington (CNN) - The newest rock star on the right will speak Friday in front of a national gathering of conservative activists.
Fresh off her upset victory over longtime moderate Republican Rep. Mike Castle in Tuesday's GOP Senate primary in Delaware, Christine O'Donnell will speak Friday in the nation's Capitol at the fifth annual Values Voters Summit.
"We are pleased to announce that Christine O'Donnell will join us to speak at the Values Voters Summit. We applaud her for valiantly defending faith, family and freedom throughout this campaign," says Tony Perkins, head of the Family Research Council, which organizes the yearly conference of social conservative activists.
"Christine O'Donnell has spoken out on behalf of the average person in her state who has been burdened by excessive tax and regulatory policies. She has tapped into the deep-seated mistrust that voters have toward big government," added Perkins.
Also speaking at the two-day gathering are Republican Sens. Jim DeMint of South Carolina and Jim Inhofe of Oklahoma, Gov. Bob McDonnell of Virginia, former Arkansas Gov. Mike Huckabee, former Massachusetts Gov. Mitt Romney, Rep. Mike Pence of Indiana, Rep. Michele Bachmann of Minnesota, former House Speaker Newt Gingrich, and other leading figures in the conservative movement.
As in years past, the results of a GOP presidential straw poll will be released at the end of the conference. Huckabee won last year's straw poll.
Thursday night, O'Donnell is expected to make her first appearance with her Democratic opponent in Delaware, New Castle County Executive Chris Coons. The two candidates will be on the same stage at a candidates forum at a Jewish community center in Wilmington.
Thanks to voter anger at Washington, incumbents and establishment candidates, and thanks to assistance from the Tea Party Express and Sarah Palin, O'Donnell defeated Castle 53 to 47 percent in Tuesday's GOP primary contest.
The winner of November's general election will fill out the remaining four years of Vice President Joe Biden's final term. Biden stepped down from the Senate after his election in November 2008 as vice president. Former Biden aide Ted Kaufman was named as an interim replacement. Kaufman is not seeking a full term. After much speculation that he would run for his father's old seat, Delaware Attorney General Beau Biden announced in late January that he would instead run for re-election as Delaware attorney general.
–Follow Paul Steinhauser on Twitter: @psteinhausercnn