David Kohan Creator, Executive Producer Max Mutchnick Creator, Executive Producer Eric McCormack Will Truman Actor Debra Messing Grace Adler Actor Sean Hayes Jack McFarland Actor Megan Mullally Karen Walker Actor Shelley Morrison Rosario Salazar Actor Mira Sorvino Diane Guest Star Harry Connick Jr. Leo Markus Guest Star James Burrows Executive Producer, Director Jeff Greenstein Executive Producer Alex Herschlag Writer, Executive Producer Jhoni Marchinko Executive Producer