Lauren Conrad and Stephen Dorff are reportedly a new romantic couple.

The reality star and the Hollywood actor have apparently been dating for some time following Lauren's split with ex-lover Kyle Howard.

Life & Style claims that the pair have been getting hot and heavy and have been spending a lot of time together.

"They've been hooking up for a while," a friend of Stephen's told the publication. "Stephen likes to have a good time, and he wines and dines her."

The pair were apparently "very flirty" at the blonde starlet's 26th birthday party at The Redbury hotel in Los Angeles on February 16.

"He was touching her arm and back," an eyewitness said.

But a friend of Lauren's claims she is happy keeping things more casual despite their obvious chemistry with each other.

"She's cautious and knows he's a player," her pal said. "She's just having fun."

Lauren has made a name for herself as a New York Times best-selling author following her spell on The Hills. She split with Kyle in June last year after three years of being together.