Hollywood stars Ashton Kutcher and Mila Kunis are engaged to be married, according to US Weekly magazine and the E! entertainment news website.<br/> <br />Both have recent photographs of the 30-year-old actress on their sites sporting a large diamond ring on her left hand.<br/> <br />The pair has been dating for about two years, and met on the set of the television sitcom "That '70s Show" in 1998.<br/> <br />It will be Kunis' first marriage, while the second for Kutcher, who officially divorced from actress Demi Moore last November.
