Fox News Channel star Bill O'Reilly is not going into radio alone.

O'Reilly — who will host The Radio Factor with Bill O'Reilly beginning May 8 — will share the mike with "some very bright women" for the first few months of the show. 

And if he likes one, she may become a permanent co-host, he suggested yesterday. 

"We're going to bring in the feminine point of view," he said. "We're going to give them a shot and see how it works for us." 

O'Reilly said he has invited Sen. Hillary Clinton to be his first co-host — but had not heard back yet.

The show will air from 3 to 5 p.m. on WOR Radio in New York and KABC in Los Angeles among others — pitting O'Reilly against his Fox colleague Sean Hannity, whose show airs at the same time. 

"I told Hannity it's my job to make his life as miserable as possible in all areas," O'Reilly joked with reporters yesterday. 

"It's a lot of fun in this business to go up against the best; we're going to do our program and he'll do what he does," O'Reilly said. "It's just healthy competition and all the pros know that. 

"Nobody is brooding about it. I'll mock him and he'll mock me. It will be a very interesting scenario." 

Elsewhere around the country, O'Reilly will be going up against Rush Limbaugh in most markets. 

The Post reported last November that O'Reilly was preparing to launch a radio version of his top-rated TV show, The O'Reilly Factor

"We didn't target anybody to go up against," O'Reilly said. "I talked to [Limbaugh's brother and agent] David Limbaugh for a good half hour and told him that if Rush had any problem with this, if I'm giving him any angst at all . . . and he said Rush had no problem at all. 

"If we're half as successful as he is, we'll be pleased." 

O'Reilly's radio show will originate from a radio studio at Fox News Channel. He says the show will include listener phone calls and e-mails. 

O'Reilly also said his radio show will be "a natural extension" of his nightly TV show. 

"It's not going to be a political show — we're going to take the hottest story from The O'Reilly Factor and get everybody in the country and work to get in their views," O'Reilly said. 

"It's a melding of radio and TV in the best possible way with immediacy," he said. "It's going to be an entertaining, informative two hours. We'll keep it moving quickly — and we're not going to take ourselves all that seriously." 

Westwood One president Joel Hollander said he hopes "to have close to 100 affiliates" for O'Reilly's show by May. 

"We really expect this to spread pretty quickly," Hollander said. 

Fox News Channel is owned by News Corp., which also owns The New York Post and foxnews.com

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