Singer Josh Groban and actress Kat Dennings are reportedly dating.

The couple made its red carpet debut at the Carousel of Hope Ball in Beverly Hills, California on Saturday (11Oct14), where the two stars appeared to be smitten with each other.

A source tells Eonline.com, "They were so cute together! They were adorable on the carpet. She was whispering in his ear a lot and they seemed really happy."

The 2 Broke Girls star later posted a picture of the pair at the event on her Instagram.com page.

Groban was previously linked to actress January Jones, while Dennings previously dated actor Nick Zano.