Mitt Romney will join the other top Republican presidential candidates at the Values Voter Summit, a conference considered a measuring stick for conservative religious voters.

Romney joins previously confirmed GOP hopefuls Texas Gov. Rick Perry, Rep. Michele Bachmann (Minn.) and a slew of other lawmakers scheduled to speak at the three-day event taking place Oct. 7-9, the legislative action arm of host organization the Family Research Council announced Thursday.

Romney won the straw poll at the event as a presidential candidate in 2008 in a close race with then-candidate and former Arkansas Gov. Mike Huckabee. Last year, Romney took third place in the poll, which is also held during non-election years, when Rep. Mike Pence (R-Ind.) won.

The event could be an important indication of Romney’s appeal to a mostly Christian crowd relative to the current crop of candidates. This year’s field includes two outspoken evangelical candidates in Bachmann and Perry, which could mean Romney will face a stronger challenge for this particular group of voters due to his Mormon beliefs.

Organizers say the annual Washington event draws pro-family grassroots activists from across the country. It is co-sponsored by other well-known conservative groups including The Heritage Foundation, Liberty University, American Values and Liberty Counsel.