Sam Worthington and Lara Bingle have named their son Rocket.

The 'Avatar' star and his model wife - who welcomed their first child into the world last week - have reportedly named the newborn Rocket Zot Worthington, sources have confirmed to the New York Post newspaper's Page Six.

It is believed the couple have chosen the tot's unusual middle moniker in tribute to Sam's father, Ronald Worthington, who went by the nickname Zot.

It was first reported Australian-born Lara, 27, had given birth to their son at Cedars-Sinai hospital in Los Angeles last week but the pair are yet to officially comment on the arrival.

Sam, 38, and Lara also recently confirmed they were married following speculation they had tied the knot in secret last year.

Meanwhile, the blonde beauty has insisted settling down and starting a family won't impact on the couple's jet-set lifestyle.

She said: ''Settling [down] doesn't mean being in one place. For me, it's about being settled in yourself. I like travelling and I like the life [Sam and I] have. I don't want to be pigeon-holed.''