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Cameron Diaz and Benji Madden 'Always Wanted More Children,' Says Source: 'It's Pure Joy for Them' (Exclusive)

The couple recently welcomed their second baby, a son named Cardinal, and is also parents to daughter Raddix, 4

<p>Donato Sardella/Getty </p> Benji Madden and Cameron Diaz attend House of Harlow 1960 x REVOLVE on June 2, 2016 in Los Angeles, California.

Donato Sardella/Getty

Benji Madden and Cameron Diaz attend House of Harlow 1960 x REVOLVE on June 2, 2016 in Los Angeles, California.

Cameron Diaz and Benji Madden are excited to finally be a family of four.

On Friday, the longtime couple announced they welcomed their second child together, a son named Cardinal Madden, making their daughter Raddix, 4, a big sister.

"Cameron and Benji love being parents and are ecstatic now with the addition to their family," a source tells PEOPLE. "They have always wanted more children. They like everything about being a mom and dad. It's pure joy for them."

As parents to their two kids, the Good Charlotte rocker, 45, and the actress, 51, are loving and supportive of one other.

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Noel Vasquez/GC Images Benji Madden and Cameron Diaz
Noel Vasquez/GC Images Benji Madden and Cameron Diaz

Related: Cameron Diaz 'Feels Beyond Lucky' to Have 2 Kids with Benji Madden: 'They Love Being Parents' (Exclusive)

"They have a solid and happy marriage and have proven already that they are natural parents who took to it easily," adds the insider. "They are so happy, you can't help but share in their excitement."

Diaz is also able to rely on her husband as they transition from one to two kids and the actress chooses new projects.

"She has that ultimate support in Benji, making it possible to do things when she feels like it," says the source.

A second source shares with PEOPLE that a second child had been on the couple's minds for a while.

"Benji loves kids," says the source. "He has always wanted them and things are so good between him and Cameron that another child was definitely in their minds for quite some time. They are thrilled and doing well."

As for Diaz, a third source adds that her skills as an actress have translated well into becoming a mom.

"Cameron is a crazy, fun and grown-up kid who turned out to be a great mom," the source tells PEOPLE. "The qualities that made her a great actress and fun-loving person have helped mold her into a good parent. She loves the family role. This is who she is."

"Even though she wanted children for a long time, I don't think she was prepared for how happy she could be, or how much these children would enrich her life," adds the source.

<p>Donato Sardella/Getty</p> Benji Madden and Cameron Diaz attend House of Harlow 1960 x REVOLVE on June 2, 2016 in Los Angeles, California.

Donato Sardella/Getty

Benji Madden and Cameron Diaz attend House of Harlow 1960 x REVOLVE on June 2, 2016 in Los Angeles, California.

Diaz and Madden revealed the birth of their baby son through a post shared on Instagram on Friday.

"We are blessed and excited to announce the birth of our son, Cardinal Madden❤️🙏. He is awesome and we are all so happy he is here!" the post's caption read. "For the kids' safety and privacy we won’t be posting any pictures - but he’s a really cute ☺️."

"We are feeling so blessed and grateful🍀. Sending much love from our fam to yours 🙏❤️. Best wishes and Good Afternoon!! 🤘⚡️," the couple continued.

Alongside their caption, Diaz and Madden shared an abstract drawing that included the words: "A little bird whispered to me."

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Read the original article on People.