Harry Styles and Kendall Jenner were reportedly "shy" during the initial stages of their ski holiday.

The One Direction heartthrob was first linked to the Kardashian family member last year and it seems their romance is going from strength to strength. Earlier this month they went on holiday to Mammoth Mountain Ski Resort in California, where it's said their feelings for each other were cemented.

"They skied together every day and partied with their friends in their posh private house in the evenings," an insider told British magazine Heat. "At first, Kendall and Harry were shy around each other, but they held hands after skiing and later in the hot tub he was rubbing her back and neck."

Although the pair are yet to confirm their romance, they have been spotted on several dates together. Harry is thought to want to take things slowly though, which is why he declined Kendall's offer to join her family - including mom Kris Jenner and sister Kim - on a winter vacation.

"Harry didn't want to have the paparazzi chasing him along with Kanye [West, Kim's fiancé] and Kim," the source explained. "So Kendall came up with plan B: a skiing holiday for just the two of them which Harry loved. It gave them the chance to get to know each other better."

It's been reported the 19-year-old One Direction star has made it clear to Kendall that he won't be appearing in her family's reality TV show Keeping Up with the Kardashians. Kendall, 18, is a successful model and he has apparently suggested she thinks about branching out from the family business too.

"Harry's made it clear to Kendall that he won't be appearing on their reality shows," the source confirmed. "He did tell Kendall that he thinks it would be healthy for her to branch away from her family and establish her own identity."