By Ken Tucker
Updated June 10, 2009 at 04:34 PM EDT

Hmmm. A certain theme is emerging on The Late Show with David Letterman. Earlier this week, Howard Stern went on a tear about how Letterman was “the host we want to watch” in late-night.

Then last night, Julia Roberts said, after a particuarly good Letterman ad-lib, “You are so much funnier than other people who talk at this time of the evening.” Check it out:

Julia is a Dave loyalist, to be sure, and her comment could not be more pointed about the new Dave vs. Conan late-night competition. Last night on The Tonight Show, the scheduled Norm MacDonald seemed to have been bumped for a bigger star, Eddie Murphy. Are the booking wars heating up?

(By the way, Bonnie Raitt and Taj Mahal were great last night on Conan.)

Did you watch Julia Roberts on Letterman? What did you think?

UPDATE: Last night’s ratings are in, and Dave beat Conan last night for the first time in household ratings since O’Brien took over The Tonight Show.

For more on the late-night wars: