Good luck trying to get a serious answer out of Brad Pitt (search), especially regarding the topic of Angelina Jolie, (search) during promotional stops for their new movie "Mr. and Mrs. Smith." (search)

The eagerly anticipated spy vs. spy flick comes out today following months of rumors about a supposed relationship between the two superstars. Pitt and wife Jennifer Aniston separated in January.

In Los Angeles on Thursday, Pitt had fun with reporters. When asked why he had dyed his hair blond, he said he was worried he wasn't getting enough publicity. "I was ashamed to admit it, but I'll cop to it."

Pitt was also asked what he and Jolie had learned about keeping the spice in a marriage after playing a married couple in the movie. "I think you're asking the wrong people. You've got to call up Dr. Phil or something," Pitt said.

Pitt preferred to discuss the chemistry he had with co-star Vince Vaughn, joking about a liaison between the two.

"Handsome, handsome fella," Pitt said. "Tender lover. Makes wonderful eggs Benedict in the morning. But I hate his morning breath. Toenails ... wish he'd clip 'em."