Known as the hardest-working man in show business, Ryan Seacrest rarely takes a day off. So when he took an unscheduled one from co-hosting “Live” with Kelly Ripa on May 18, there was cause for alarm at the show’s network. An ABC source told The Post that some members of the show’s production team were made aware of Seacrest’s absence less than 30 minutes before they were to go live on air. “It was a last-minute thing and there was a sense of panic at ABC when we were told that Ryan couldn’t make it that morning,” the ABC source revealed. Just hours earlier, the 45-year-old had prompted serious fears for his health during the “American Idol” finale — when, while broadcasting from his Los Angeles home, he struggled with words, seemed confused and had a visibly droopy right eye. Seacrest’s reps were forced to deny that the host had suffered a stroke amid frantic tweets from worried fans. #RyanSeacrest Page Six is your source for celebrity news, gossip, entertainment, pop culture, photos, video and more. Catch the latest news and gossip here: pagesix.com/ Follow us on: Facebook - www.facebook.com/pagesix/ Twitter - twitter.com/PageSix Instagram - www.instagram.com/pagesix/ Check out We Hear, our Page Six podcast! podcasts.apple.com/us/podcast/we-hear/id1479076951 open.spotify.com/show/4A4v65sX7nIHpEtrYnInDm And Page Six Style has the latest news on celebrity style including fashion trends, red carpet photos, and beauty tips. Catch the latest news here: pagesix.com/style/ Follow us on: Facebook - www.facebook.com/pagesix/ Twitter - twitter.com/PageSix