ET has the latest... Our Mark Steines was on hand for the star-studded premiere of the new comedy 'Couples Retreat' where things turned serious when the A-listers responded to the David Letterman extortion trial. "I honestly have not seen his response to it but from what I understand, what he's done has been consistent with the kind of guy that I know," Jason Bateman said. "He's very intelligent, very ahead of everything, and he seems to have handled it in a very professional way, which you wouldn't expect anything less from him. It's not going to make me stop watch it." Meanwhile, 'Couples Retreat' -- starring Vince Vaughn , Jon Favreau , Bateman, Kristen Bell , Kristin Davis , Malin Akerman and more -- centers around four couples who travel to a tropical island for a vacation but are forced to work on their marriages and participate in therapy sessions. Also, keep an eye out for former ET correspondent Carlos Ponce, who plays the couples' shirtless-and-muscular yoga instructor. Continue reading... Related stories: Mark Steines' Photo Album with the Stars of 'Couples Retreat' in Bora Bora Mark Steines and the Stars of 'Couples Retreat' in Bora Bora!