An eyewitness tells Life & Style the 18-year-old -- who recently dated 32-year-old U.K. TV host Caroline Flack -- was hitting on former Bachelorette Jillian Harris, 32, while hanging at the W Westwood in LA on April 2.
"He asked her for her number and said, 'Are you busy tomorrow night? I'd like to take you out to dinner if you're free,'" the eyewitness tells Life & Style.
But Harry isn't getting a rose from Jillian any time soon. "Harry is cute, but I could never date a guy that young," she tells Life & Style. "Never."
Jillian's not the only American lady to have caught the young Englishman's eye. During a recent U.S. radio show appearance, Harry carried a poster of Kim Kardashian, 31, with a note on it that read "Call me maybe?" and also admitted to liking Sofia Vergara, 39.
Seems like someone is definitely on cougar alert!
Photo credit: R/R; ABC