Hollywood stars Ashton Kutcher and Mila Kunis are engaged to be married, according to US Weekly and the E! entertainment news website. The two, who have been dating for about two years, appeared together on the popular television sitcom That '70s Show.
Photographs on the US Weekly and E! websites taken of Kunis in Los Angeles show her sporting a large diamond ring on her left hand.
Kutcher, 36, is divorced from actress Demi Moore. He appears in the TV sitcom Two and a Half Men and starred last year in the movie Jobs.
Kunis, 30, appeared in the movies Ted in 2012, Black Swan in 2010 and Forgetting Sarah Marshall in 2008.
Mila Kunis has been named world's sexiest woman, bringing an end to a four-year run of British stars at the top of the list.
The Black Swan and Friends with Benefits star took the number one spot in the annual FHM 100 Sexiest Women in the World poll.
Last year's victor Tulisa plummeted right out of the top ten, while Coronation Street actress Helen Flanagan has risen to third place, from number 47 in 2012.
Singer Rihanna took second place, rising one place from her spot last year.
Editor of the section Dan Jude said of winner Kunis "Not only is she naturally stunning, but she has a great sense of humour and isn't afraid to poke fun at herself.
"The nation has spoken, and the verdict is that she is officially the perfect girlfriend. She'll take some beating in 2014."