The actress, 36, "has adopted a child," her rep says in a statement to PEOPLE. "She is the proud mom of a healthy baby boy named Jackson."

By peoplestaff225
Updated March 14, 2012 01:25 PM
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Surprise — Charlize Theron has joined the Hollywood mom’s club!

The actress, 36, “has adopted a child,” her rep says in a statement to PEOPLE. “She is the proud mom of a healthy baby boy named Jackson.”

Jackson is the first child for the South African-born Theron, who recently starred in Young Adult. She won an Oscar for her role as a serial killer in 2003’s Monster.

No further details about her new addition were released.

— Rennie Dyball with reporting by Anne Marie Cruz