ZACH GALIFIANAKIS STARRING IN 'REPLY ALL': Zach Galifianakis will star in an upcoming comedy called Reply All, about the all-too-common error of sending a private email to a large group of unintended recipients. Deadline.com reports that Galifianakis will play the "hapless" sender.

MARK WAHLBERG GETS STAR ON WALK OF FAME: Mark Wahlberg was presented with a star on the Hollywood Walk of Fame on Thursday. After gaining fame as a rapper and model, Wahlberg got his big film break in 1997's Boogie Nights. He's since received an Oscar nomination for his work in The Departed.

RACHEL BILSON RETURNING TO TV: Rachel Bilson is returning to How I Met Your Mother. PerezHilton.com reports that Bilson will play the yet-to-be revealed mother's roommate, Cindy, in the upcoming season premiere. Series creator Carter Bays said, "The season premiere is going to be very much informed by her presence."

TROY AIKMAN ON 'DWTS'? Troy Aikman is back-tracking on his Dancing With the Stars announcement. Although he told TMZ.com that he'd appear on the show in the fall, he later told The Dallas Morning News that he was just joking. When asked if the casting was true, Aikman said, "Heavens, no." Bloggers speculate that the denial was just a cover-up and Aikman actually will be on the show.