After suffering backlash from supporting their That 70s Show co-star Danny Masterson amid his rape trial, Mila Kunis and Ashton Kutcher are hoping to rebuild their tattered marriage. Sources claimed Kutcher and Kunis are planning to renew their vows in an attempt to start a fresh chapter in their strained relationship, RadarOnline.com can reveal. Kunis, 41, and Kutcher, 46, met on the set of the hit sitcom. After the Dude Where’s My Car? star split from ex Demi Moore in 2011, the former co-stars began dating in 2012 and tied the knot in 2015. Their relationship was tested when their letters of…