Charlize Theron throws star-studded party for son's birthday

Actress Charlize Theron threw a star-studded birthday bash for her son at her Hollywood Hills home with A-list guests including Sandra Bullock. The 37-year-old star, who adopted son Jackson in March 2012, celebrated the little one's first birthday with an intimate party at her home, reported E! News. "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," said a source. "They all walked in together and headed for the backyard where children's music was playing and kids were running around," the souce added. The party was a "low-key" affair as Theron reserved it to her closest friends and family. Theron's fellow Oscar-winning starlet, Bullock was a generous party guest, bringing "a big bag of presents from Landis' Labyrinth Toy Shop" for the birthday boy, source said.