When Charlize Theron adopted a baby boy named Jackson in March, her entire world changed.

"It's strangely everything that you've hoped for and it feels so right. I don't know how else to say it," Theron told E! News over the weekend while promoting her new film, Snow White and the Huntsman, in London. "I feel like I can't remember anything prior to him. I feel like it was always just meant to be what it is."

The single star celebrated her first Mother's Day overseas. "My mom and Jacks are here with me. We had a nice morning. He got to spend a little time with me and he got to have a little snuggle," Theron, 36, revealed. "I'm going to see them later tonight. It's really nice to have him here."

Theron -- who hasn't been in a serious relationship since ending her nine-year partnership with Stuart Townsend in 2010 -- is amazed by how quickly her bond with Jackson began.

"It's an overwhelming sensation of love," Theron gushed. "There's almost a moment where I feel like I can't remember anything prior to him. I feel like it was always just meant to be what it is. Everyday I'm just like, 'It's not possible to love you more,' and then 20 minutes later you're like, 'Oh my god! How is this possible?'"

The Prometheus actress "has always wanted to be a mom," a Theron source recently told Us Weekly. "She is glad to be able to do it on her own now and is so happy to be a mom."

(Us Weekly)