An Indian boy ends up thousands of kilometres from home. He survives many challenges before being adopted by a couple in Australia. Some 25 years later, he sets out to find his lost family.

Australian actress Nicole Kidman weighed in on Donald Trump, saying Americans need to get behind their new president.

The actress revealed the political stance in an interview with BBC Two's Victoria Derbyshire this week.

Sitting down to talk about Kidman's new film Lion, talk segued to Kidman's dual American and Australian citizenship, and her opinion about the reality-TV-host-turned-politician.

MIKE BLAKE/GETTY Actress Nicole Kidman says Americans need to get behind Donald Trump.

"[Trump is] now elected and we as a country, need to support whoever is the president," the 49-year-old said.

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"That is what the country is based on. And however that happened, it happened, and let's go."

Nicole Kidman and Keith Urban have two children together, but Kidman has revealed she wishes they had more.

Kidman, who was born in Hawaii but grew up in Australia, lives in Nashville with her husband, country singer Keith Urban, and their two daughters.

Kidman also revealed to Derbyshire her one regret in life - that she had not had more children.

"I would have liked probably two or three more children, I love children, I love raising children, my sister has six children, I just love them," she said.

Kidman, who has two adoptive children with her ex Tom Cruise, said she would consider adopting again, but said Urban felt he was "maxed out", and would prefer to focus on what they have.