LOS ANGELES (Reuters) - A man who heckled Bristol Palin in a Los Angeles bar and insulted her conservative politician mother, Sarah Palin, filed a lawsuit on Wednesday accusing the single mom of defamation.

Talent manager Stephen Hanks also sued cable channel Lifetime, which includes film of the 2011 incident in Bristol Palin's upcoming reality TV show, claiming he had not given the program's makers his permission to be filmed.