Tina Fey is setting her sights on getting fit in the first of a new series of spots from American Express.

The latest ads from Ogilvy & Mather New York promote Amex's Blue Cash Everyday Card, highlighting that it gives you cash back and extra benefits on purchases. In the longer film, Fey is on top form, wisecracking in her trademark witty fashion while stocking up on workout gear. She examines some "creepy gloves for my feet" and invents some yoga positions before hitting the checkout with a few impulse purchases.

Two shorter spots see Fey in a supermarket -- where you might spot actor Thomas Middleditch from HBO's "Silicon Valley" playing the till worker -- as she goes on a doggie shopping spree and stocks up for a "cheese storm."