From best-seller to the big screen, "The Fault in Our Stars" opens in theaters Friday. In the Foxlight’s Michael Tammero gave us a preview of the movie, which tells the story of two cancer-stricken teenagers, on Fox and Friends this morning.

He called it an "emotional rollercoaster" that will make grown men cry. Tammero noted that he hadn't realized until premiere night that the novel by John Green was so popular among young girls.

Tammero said the official trailer (below) has been viewed on YouTube more than 20 million times.

Tammero caught up with Green on the red carpet, along with the young stars of the movie, Ansel Elgort and Shailene Woodley.

Check it all out in the clip above.