Nick Jonas and Kate Hudson are on holiday together.

Nick Jonas

Nick Jonas

The pair - who were first romantically linked last year although neither have confirmed a romance - were spotted at Mammoth Mountain ski resort in California this week.

A source told PEOPLE: "She makes him laugh. They have fun together."

Kate, 36 and 23-year-old Nick were first linked when they were spotted on vacation together in Florida in September.

Meanwhile, Kate recently conceded it can "hard" balancing her career and her family life.

The 'Wish I Was Here' star said it can be a tough to focus on both her job and raising her two children, sons Ryder, 11 and Bingham, four.

She revealed: "I think a lot of people, especially when you're a woman, you have kids, and work on movies, it's hard because you're away from them. There's nothing lazy about it.

"You go to work, get on the first plane home even if it's for eight hours, go back to work. I don't want to be away from my family, I love it so much. I just enjoy being on movie sets."