Josh Groban feels ''very lucky'' to be dating Kat Dennings.

The 'Brave' hitmaker was very nervous before singing in front of the '2 Broke Girls' actress for the first time at the Carousel of Hope Ball in Beverly Hills, Los Angeles on Saturday (11.10.14), where the duo made their first official outing as a couple.

Speaking before the event, the 33-year-old star told 'Entertainment Tonight': ''I do have such a lovely date tonight. I'm very lucky my girlfriend has joined me tonight. It's her first time hearing me sing, so I'm going to do some extra warm-ups so I don't suck.''

Prior to dating Josh, the 28-year-old beauty was in a relationship with Nick Zano, who she co-starred alongside on the American sitcom for two seasons.

Josh has previously dated January Jones and also been romantically linked to Katy Perry in the past.

The hunk recently admitted he quite enjoyed being single but sometimes found life a little bit lonely without a lover by his side.

He said last year: ''I am single and I do enjoy it. I enjoy being in a relationship too, though.

''I like the saying, 'A good relationship is a friendship on fire.' It's nice to have a companion - especially when you're a solo artist, as it can be very lonely.''