We’re playing one of our favorite games with Rach today, where we surprise her with a guest (or in this case, a co-host) and she has to try to guess who it is without seeing him or her.

Today, we all know that her mystery co-host is Regis Philbin, but she doesn’t know that! He gives her such hints as, “I love you,” “You’re pretty hot,” and, “We’ve had dinner together, in and out of the show. A couple of times at your place.” Her first guess -- Tom Jones! Wrong!

Watch her keep trying -- and see if she can eventually figure it out.

WATCH: Regis' Most Hilarious Moments with Rach