The web series runs exclusively on Hulu. Documentary filmmaker Morgan Spurlock, who's perhaps best known for his "Super Size Me" film, directs it.
Miller's episode focuses on his preparations for December's fight with Michael Bisping at The Ultimate Fighter 14 Finale.
It includes guest appearances from teammates such as Siyar Bahadurzada and Pat Cummins, as well as trainer/manager Ryan Parsons.
"He's just such a unique guy," Parsons said of Miller. "He's got a really unique way of looking at things. People who look at him, they have this false view of who he is. They think he's a clown or this or that.
"His biggest problem is that he's the smartest guy in the room. He really is. He really has such a good sense of who he is. He's a guy who just clawed his way to the top and found a way to live his dream."
The half-hour show also discusses Miller's brand building, his big online following, how he got back in the UFC, media responsibilities, training injuries and more.
Check out the embedded episode above (which may be limited to U.S. viewers).
Miller (24-8 MMA, 0-2 UFC), who ultimately lost the fight to Bisping (and nearly his UFC job in the process), next meets C.B. Dollaway (11-4 MMA, 5-4 UFC) at UFC 146 on Memorial Day weekend.
Full video: UFC's Jason Miller featured in new 'A Day in the Life' Hulu series
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