Mila Kunis has Ashton Kutcher's back. On the Paramount+ series The Checkup with Dr. David Agus, the That '70s Show alum talked about how his wife supported him as he battled the rare autoimmune disease vasculitis years ago. "From a doctor, to be able to see you today compared to what it was back in November 2019," Dr. David Agus told Kutcher on the show, "I will say your wife is amazing." Kutcher, who tied the knot with Kunis in 2015, concurred, "My wife is the best." As the doctor recalled, Kunis was "curled up" by her husband's side. The actor revealed on an episode of Running Wild with Bear Grylls that he was diagnosed with disease vasculitis. Kutcher's condition also affected his mobility. "Part of it is this sort of mental thing I have around achieving a full comeback, from waking up in the hospital," he said. "I was unable to walk. And I was like, if I can go from not being able to walk to running a marathon in a three-year span, then I can just let that be a part of the past."