David Letterman is bringing out the heavy artillery.

As week two of the Late Night War nobody really wants but those of us in the media are hell-bent on waging gets underway, Letterman has been calling on some of his favorite guests in his attempt to quash any premiere week momentum over at The House of Conan.

Last night, Dave trotted out Howard Stern. Tonight, he’s recruited Oscar winner (and Friend of Dave) Julia Roberts.

Roberts and Letterman spend a good chunk of their visit talking about Letterman’s recent nuptials, with Roberts asking if Letterman’s bride now takes the name “Mrs. Letterman.”

“No, she’s Dave,” Letterman said.

Conan has a pretty big Hollywood start tonight, too: Eddie Murphy. Check out a clip from tonight’s Letterman after the jump.