Nick Jonas has introduced Delta Goodrem to his family

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The 18-year-old singer - who has previously romanced Miley Cyrus and Selena Gomez - began dating the Australian popstar in May and now things are getting so serious, the 26-year-old beauty has now met his mother Denise and younger brother Frankie.

According to website X17 Online, Nick took Delta to Beverly Hills restaurant Villa Blanca, where they enjoyed a meal with Denise and Frankie.

As they left, Nick also bought Delta a rose and helped her into their car first.

The pair were first linked in May after they were spotted leaving the ArcLight cinema in Los Angeles hand-in-hand.

Nick - who is currently working on his solo career - later tweeted: "I feel so blessed. Had a great weekend."

Delta split from fiance Brian McFadden in April after a six-and-a-half year relationship with the couple claiming they had "grown apart".

A statement released by their publicist at the time said: "Delta Goodrem and Brian McFadden regretfully announce that they are no longer engaged, and after much consideration, have mutually decided to end their relationship."

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