Charlize Theron

Sandra Bullock and Chelsea Handler's children helped Charlize Theron's son Jackson celebrate his first birthday.

Charlize loves her new son and revealed she would happily have many more if she could guarantee they would be like him.

She told E! News: ''More? I don't know. I mean, if all my kids could be like Jackson, I'd have 10 more right now. My mom is always asking me when.''

Charlize's mother Gerda added: ''I'd love her to have more.''

The 37-year-old beauty cut off her long blonde hair for her role as Furiosa in 'Mad Max 4: Fury Road' and loves the freedom that comes with having short hair.

She said: ''It's great. It's so low maintenance, and having a kid, you need as much time as you can get.''

Last month Charlize celebrated Jackson's first birthday with an intimate party at her Hollywood Hills, California home and A-list guests including Sandra Bullock and Chelsea Handler attended.

A source said: ''Sandra Bullock was one of the first guests to arrive with her son Louis. As they walked into the party, they bumped into Chelsea Handler who had also just arrived in a limousine. They all walked in together and headed for the backyard where children's music was playing and kids were running around.''

It's reported that the ''low-key party'' hosted 20 guests and was reserved to just her closest friends and family.

The source added: ''There was a lot of laughter and screams as everyone had a good time.''

© Bang Showbiz