Dax Randall Shepard is an American actor, comedian, filmmaker and podcast host. Since 2018, he has hosted Armchair Expert, a podcast that interviews celebrities, journalists, and academics about their lives. Shepard has appeared in the feature films Without a Paddle, Zathura: A Space Adventure, Employee of the Month, Idiocracy, Let's Go to Prison, Hit and Run, and CHiPs, the last two of which he also wrote and directed. Shepard portrayed Crosby Braverman in the NBC comedy-drama series Parenthood from 2010 to 2015. He also played Luke Matthews in the Netflix show The Ranch, co-starred in ABC's Bless This Mess and acted in the MTV practical joke reality series Punk'd. He is also a co-founder of the diaper and baby product company Hello Bello with his wife, Kristen Bell.