Ben Stein, known in part for his “Bueller … Bueller … Bueller” line in the 1986 film “Ferris Bueller’s Day Off,” donated to Bachmann’s campaign earlier year. Best-selling author Dean Koontz also cut a check for the outspoken conservative legislator.

Actor Gary Sinise, who endorsed McCain in 2008, has no plans to back a candidate this time around. “Gary isn’t registered with any political party, and isn’t endorsing a candidate,” a spokeswoman for Sinise said.

Jon Cryer, the “Two And A Half Men” actor who endorsed McCain three years ago, is also not going public with his candidate of choice.

“Jon is not a Republican. The mistake was made because in 2008 he attended events for both parties. It seems the Republican Party was very quick to align him with their group of supporters. He did attend events for both parties, because he wanted to hear what both sides had to say. He’s not really political,” said Cryer’s spokeswoman, Karen Sanfilippo.