Diaz and her husband, Benji Madden, just passed the one-year mark as a married couple, and sources tell PEOPLE the actress has never been happier.
"Cameron is increasingly happy in her life with Benji," a source tells PEOPLE.
A second source tells PEOPLE that getting married has "done wonders" for the Bad Teacher star, 43, and given her a sense of peace in her life.
"She had a good run as a tough talking single sister, but like others of her age, she has mellowed and wants more out of life," says the source. "She is getting it and loving it. She and Benji like and love each other. Their minds are in sync, they are on the same page."
So what makes their relationship work so well? Madden's unwavering love and support for his bride.
"Benji came into her life at a time when she needed stability and she got it," says the first source. "He is different from her past boyfriends. She saw a family situation with him and she needed that. And he is fine with whatever she wants to do in her career."
The couple are often publicly affectionate on social media and Madden even has Diaz's name inked on his chest.
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And after just over a year of marriage, the happy twosome might be ready to add to their family.
"She has settled in, settled down and wants to have a family," adds the source. "She is doing everything she can to enjoy this time in her life.
"She is feeling fulfilled and wants to be a mom."
Reporting by LINDA MARX