Los Angeles, Jan 1 (IANS): Actress Charlize Theron is getting ready to adopt a second child.

The 38-year-old is keen to have a sibling for her first adopted son, two-year-old Jackson, and she is likely to start the process of adoption soon, reports femalefirst.co.uk.

"Charlize admits it's a lot to go through, but she definitely wants Jackson to have a little brother. She's starting the process all over again right after the New Year. She wants Jackson to have a sibling who isn't four or five years younger than him - she wants to raise them together,” said a source.

The South Africa-born actress has not yet decided which country to adopt the child from or whether he or she will share Jackson's African-American heritage.

"She's made no decision about that yet. She is eyeing the possibility of adopting a child from South Africa this time, but she hasn't decided. She just knows she wants another baby,” the source added.

Theron, who split with long-term partner Stuart Townsend after nine years of togetherness in 2010, became mother to Jackson in 2012.