Credit: Splash News Online

Hotlanta's hospitality isn't putting a smile on Kim Kardashian's face just yet!

Eleven days after filing for divorce from Kris Humphries, the 31-year-old looked sullen and serious on the set of Tyler Perry's The Marriage Counselor in Atlanta on Friday.

Friday, 11/11/11 should be lucky day for Kardashian. She and her sisters often tweet for fans to "Make a wish," at 11:11.

Although she looked focused on her work, her hair and makeup were impeccable. She kept warm in a black leather jacket. But from her somber appearance, it didn't look like she was having a great time on set.

In the comedy, the reality star plays Ava, pal and coworker to the titular, romantically-challenged marriage counselor Judith (Jurnee Smollett).

As Ava, Kardashian will help boost Ava's self-confidence with a big-city makeover.

"She's being very quiet and isn't smiling very much," a set source says, adding that she was seems very "on task" for the job at hand. "Kim has been reading a script and not being very social at all."

Another source tells Us that Kardashian "isn't gong out at all" and goes straight from her hotel to set each day.