PARK CITY, Utah - Christina Hendricks not only reunited with her "Mad Men" cohort John Slattery for "God's Pocket," but she found herself bringing her "A-game" for the film's co-lead, Philip Seymour Hoffman.

"[I] need to do thte best I could possibly do to work with someone like Philip Seymour Hoffman," Hendricks said on the red carpet for Sundance's "God's Pocket," calling the opportunity to work with the "Capote" actor as "a dream come true."

She also found great comfort in returning to work with Slattery, who plays her once-lover on "Mad Men" and for this new film was her director. She described their "shorthand," how walking onto set was like the first day of school and being able to immediately find a friend.

For the dark tones of "God's Pocket," too, she said Slattery added his signature dark humor into the mix, much like he does for Roger Sterling on "Mad Men." Watch the whole interview above to see how Hendricks describes his work.