Share this Story

Sean Penn wants to be a daddy for the third time, with Charlize Theron

For Cailyn Cox, writing isn't just a hobby, it's her life. Passionate about Hollywood, she makes it her mission to find the most entertaining celebrity gossip for SheKnows readers. And when she's not enthralled in the celeb world, she's ...

Sean Penn's serious about Charlize Theron and her baby boy; so serious that he has big plans

Charlize Theron and Sean Penn are pretty serious about each other and their relationship just keeps blossoming. In fact, the couple is reportedly ready to start a family together.

More: Charlize Theron and Sean Penn accused of mistreating her 2-year-old son

A source revealed to People magazine that the Gangster Squad actor has plans to adopt Theron's son, Jackson, age 3.

"Charlize and Sean are very serious," a source close to Theron reportedly told People. "Charlize says this is it. Jackson already calls Sean daddy."

"This is the first step toward them getting married," the source adds.

More: Sean Penn, Charlize Theron engaged — and it was everything but traditional

The South African-born actress and Penn have been dating for over a year (since taking their longtime friendship to the next level), and are even rumored to have gotten engaged while on a trip to Paris, France.

Adopting Jackson (who Theron adopted herself in early 2012, when he was 4 months old) would make the tiny tot Penn's third child, as he shares two children, daughter Dylan and son Hopper, from his previous marriage with wife Robin Wright — and Penn might not stop at three kids.

According to Us Weekly, the Oscar-winning stars have big plans for their relationship and they are already talking about more kids.

More: Sean Penn's daughter has a distinct opinion of Charlize Theron

A source revealed to the mag that "Sean always knew that to truly earn a place in Charlize's heart, connecting with Jackson was one of the most important parts."

The source added, "There is still talk of adopting again and giving Jackson a brother or a sister."

We're glad to hear that things are going so well between this A-lister couple.

New in Entertainment

And you'll see personalized content just for you whenever you click the My Feed .

SheKnows is making some changes!

b h e a r d !

Welcome to the new SheKnows Community,

where you can share your stories, ideas

and CONNECT with millions of women.

Get Started