Mumbai, Nov 28 (IANS) American television actor Blaire Underwood has praised her "Quantico" co-star and actress Priyanka Chopra and says it is fascinating to work with her. "I have had a number of conversations with Priyanka Chopra about being number one on the call sheet being the star of the show. She downplays that, but she is the main protagonist, we watch the show through her eyes and her perspective, so she is very much the star of the show and she carries it with a plum," Underwood said in a statement. "She is very gracious, she is very humble, she is always prepared, she is professional she is about her business," Underwood added. The actor says he told Priyanka that she is "emotionally full". "It's always fascinating to work with her, because she trusts her emotions and if you look in her eyes there is always an emotion in her eyes without trying to do too much," he said. Underwood, who is seen playing the role of CIA officer in the show, which airs on Star World, says "what makes this show really work is that you really get into the characters". "And she sets the tone in terms of the standard of the work we are doing, the depth of the work we're doing," he added.