Wait! Are Kate Hudson and Nick Jonas really hooking up?!

Los Angeles - Kate Hudson and Nick Jonas have enjoyed a string of secret dates.

The Almost Famous actress and Levels hitmaker - who, at 22, is 13 years her junior - have reportedly embarked on a romance and were spotted "acting like a couple" at Fillmore Miami Beach on Sunday.

A source said: "The buzz around the property is that they were acting like a couple. They were definitely there together."

The unlikely pair met through Kate's brother Oliver Hudson, who stars in slasher series Scream Queens with the heartthrob.

Nick - who found fame in The Jonas Brothers with siblings Kevin and Joe - was also reportedly due to meet the pretty actress at LIV nightclub after his concert at Fillmore Miami Beach but they didn't show.

Meanwhile, despite other reports stating the pair are "just friends" they apparently went to great lengths to keep their liaison under wraps at the hotel.

The source told E! News: "They made an effort to keep things under wraps, using the private pool for members that's harder for regular guests, and paparazzi, to get glimpses of."

Kate, 36, has two children, Bingham, four, with Muse singer Matt Bellamy and Ryder, 11, with her ex-husband, Black Crowes singer Chris Robinson.