Fast-casual restaurants have become increasingly popular over the past few years, with Chipotle (NYSE:CMG) leading the charge. But Chipotle isn't the only fast-casual chain growing fast, and the company will be facing plenty of competition in the coming years as smaller chains aim for rapid expansion. 

Click through the following slideshow to learn about five of the fastest-growing fast-casual chains: Chipotle, Shake Shack (NYSE:SHAK)Zoe's Kitchen (NYSE:ZOES)Noodles & Company (NASDAQ:NDLS), and The Habit Restaurants (NASDAQ:HABT).  

Timothy Green has no position in any stocks mentioned. The Motley Fool owns shares of and recommends Chipotle Mexican Grill and Zoe's Kitchen. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.