Miss USA -- We Have Our HOSTS!

Miss USA scored 3 new hosts, and 2 of them come with beauty pageant experience ... TMZ has learned.

Reelz -- which picked up the pageant after NBC dropped it -- landed Todd Newton and Alex Wehrley to host. Alex was Miss USA Wisconsin in 2009, and Todd -- a Daytime Emmy winning TV presenter -- hosted Miss Universe in 2001.

We're also told Julie Alexandria -- an "OK! TV" host -- will be working the mic backstage for Sunday night's competition.