Cameron Diaz and Benji Madden dating relationship is getting more serious and new reports have cropped up that they are read to take the plunge. Meanwhile, Nicole Richie takes son and daughter to visit the "Sex Tape" star in New York.

In the latest Cameron Diaz and Benji Madden dating news by PageSix, the publication quoted a friend of the 41-year-old actress that wherever the pair goes, they immediately attract attention of the crowd, and not just because of their celebrity status.

According to the source, the two "look completely mismatched."

Although Benji Madden seems to have soften up those rough edges, with no small help from Cameron Diaz no doubt, he still retained his "bad-boy edge" in the way he dresses.

However, the New York Post said that Benji Madden just might seem the person who will rein in Cameron Diaz who earlier intimated her views against marriage and monogamy.

"Benji has pretty much moved into her house in Beverly Hills, and they've talked marriage. None of us would be surprised if she called us and said: 'Guess what? I'm Mrs. Madden!' " the source added.

According to People magazine, Cameron Diaz and Benjie Madden dating relationship is not just going to be a summer fling as the couple thinks that marriage seems to be next progression in their relationship.

"It's early but they have talked about marriage. Benji spends so much time at Cameron's that it seems he now kind of lives there," People said. "Cameron hasn't looked this happy for years."

Meanwhile, MailOnline published a series of photos showing Nicole Richie visiting with somebody who could be her future sister-in-law.

Nicole Richie and her two kids, Harlow, 6, and Sparrow, 5, were spotted on Tuesday stepping out of Cameron Diaz's apartment in New York. The British tabloid said that Lionel Richie's daughter is busy promoting "Candidly Nicole" over at VH1.