Scott Brown has a big night ahead of him on Fox News.
The former senator from Massachusetts tweeted that he will be guest hosting for Bill O'Reilly on Monday night. Fox News announced it hired Brown as a contributor in February, a couple months after he lost the Massachusetts senate race to Elizabeth Warren.
Brown appeared on Sean Hannity's Fox News show just one day after the network announced his new gig. His role guest-hosting "The O'Reilly Factor," the most popular show on Fox News, is Brown's most high-profile appearance on the network to date.