Charlize Theron has fuelled rumours she and Sean Penn are set to wed. The actress - who has been romancing the 'Milk' star for eight months - was spotted in Los Angeles International airport on Wednesday sporting a huge diamond ring on her engagement finger, prompting speculation her 53-year-old beau has proposed. The sighting of the ring comes just a week after it was claimed the pair are planning to tie the knot in the star's native South Africa in the coming months. A source said: "They want to get married very soon." And Charlize is reportedly keen to adopt a child with Sean shortly after they've exchanged vows. The insider added: "Charlize always intended to have another child." Sean has also been bonding with Charlize's young son. The insider added: "He is a father figure to him." Meanwhile, the loved-up pair - who have known each other for 18 years - have watched each other change over the years and are looking forward to a positive future together as a couple.
