Grammy winner will begin filming the project this month, after performing the national anthem at Sunday's Super Bowl.By Jocelyn Vena Carrie Underwood Photo: Jason Merritt/Getty Images for PCA Carrie Underwood is taking her act from the small screen to the big screen. The country-music superstar has been cast in a supporting role in the movie "Soul Surfer." Filming begins this month. Underwood, who picked up a Grammy for Best Country Collaboration (with Randy Travis) and was one of the stars featured in the Michael Jackson tribute at Sunday's Grammy Awards, will play church youth leader Sarah Hill.