Cameron Diaz and Benji Madden are ''eager'' to have children.

The 'Sex Tape' star, who married the former Good Charlotte rocker earlier this year after a whirlwind romance, is reportedly planning to start altering her lifestyle in preparation for starting a family in the near future.

A source close to the couple said: ''She will take things as they come. But don't be surprised to see her calm down a bit and get in the best shape for a possible pregnancy.''

Meanwhile, the 42-year-old actress is really enjoying the honeymoon period after tying the knot at her Los Angeles home in January.

The insider told PEOPLE magazine: ''Cameron is so happy being a wife.''

The blonde beauty previously admitted she felt under pressure to have children.

She said: ''We live in a society where everyone has kids, so they want other people to have kids. There is this culture that says celebrities are supposed to be just like us, so people think, 'I have children, why doesn't she?' But I'm not going to do something because it's expected. If a family happens, then it happens. If children come to me, then I would do that, but I'm not someone who feels like she has to do something because it's expected.''