AceShowbiz -

Contrary to rumors, Khloe Kardashian is not dating Los Angeles Dodgers outfielder Matt Kemp, a source claims. According to the source, the alleged couple is actually longtime friends and the reality star is still dealing with her failed marriage to Lamar Odom.

"They are just friends and have been for a long time," the source explains to PEOPLE. "Khloe is absolutely heartbroken right now [over Lamar] and dating someone is the last thing she's thinking about." Another source close to the reality star adds, "It could be heading [romantic] in the future, but Khloe wasn't spending time with him when she was still with Lamar. She absolutely wasn't. People need to remember that she and Lamar haven't lived together since June."

Steve Martin then decides to poke fun at the dating rumors surrounding the "Keeping Up with the Kardashians" star. "Despite rumors, Khloe Kardashian and I are 'just friends,' " he jokingly writes on Twitter. "Be sure to check out my new album, 'Just Friends with Khloe Kardashian.' "

The "Cheaper by the Dozen" star continues, "Now trying to downplay the Khloe/Steve thing with trusting wife...Khloe just called asking what printer to buy. Further proof that we are 'just friends'...Uh oh. Trusting wife online buying replacement cartridges for the same printer I recommended to Khloe." Martin is married to Anne Stringfield.

Khloe filed for divorce from his basketball player husband last week. Shortly after, speculations of her dating Kemp emerged after he posted a photo of Kris Jenner's Christmas tree on his Instagram. The two were also seen hitting a gym together.