On Sunday morning, Seacrest, 35, and Hough, 22, were seen jetting around L.A. in Seacrest's Aston Martin convertible.
"It was warm and beautiful outside and the couple cruised with the top down on the car," says an eyewitness. "Ryan and Julianne looked very happy together and even held hands in the car. Ryan was laughing and seemed very smitten with Julianne."
Later that morning, the couple enjoyed a healthy brunch at the Four Seasons Hotel's poolside Cabana restaurant.
During the meal, they seemed happy, but tried to go unnoticed by donning hats. Still, when some fans recognized the American Idol host, he shared a few words and hugs with them.
"Julianne didn't seem to mind that Ryan got attention, and instead acted supportive and waited by his side until he was finished greeting his fans," says the eyewitness.
Aside from spending quality time with Seacrest, Hough has a lot of other things are her plate: After filming Footloose near Atlanta this month, she'll finish her second country album, due out in November.