'Will never stop loving you unconditionally': Jason Segel and Alexis Mixter split after eight years SECTIONS Last Updated: Apr 30, 2021, 03:43 PM IST Share The 'This Is 40' actor and Mixter began dating in December 2013. LOS ANGELES: Hollywood star Jason Segel and his longtime girlfriend Alexis Mixter have split after eight years of being together. Mixter, a 30-year-old artist, announced their split in a heartfelt Instagram post on Thursday alongside a photo of the two. "This is a photo of two best friends. This guy and I have shared so much life together. Changed each other at a soul deep level. All for the better. The depth of our bond was something I could never have anticipated," she wrote in the caption.