Walter McBride/WireImage Wedding bells are ringing for Amanda Seyfried! News has confirmed that the 30-year-old actress is engaged to her boyfriend and Last Word co-star Thomas Sadoski after less than a year of dating. The two stars have kept their relationship fairly private with minimal public appearances. The two stars were spotted sharing a passionate lip-lock while lunching in Los Angeles at popular organic spot Cheebo back in March, which sealed the deal on those romance rumors at the time.