Though she and her mother may not be on the best terms with Hollywood these days, Bristol Palin plans to make her acting debut in the ABC Family series “The Secret Life of the American Teenager,” ABC News reported on Tuesday. On that ABC Family show, about an unwed teenage mother dealing with the consequences of her pregnancy, Ms. Palin will play a fictionalized version of herself, who meets the show’s lead character at a music program for teenage moms. Ms. Palin, 19, a daughter of the Republican vice presidential candidate Sarah Palin, revealed that she was pregnant during the 2008 campaign and gave birth to a son, Tripp, on Dec. 27 of that year. She and her mother recently came into conflict with the Fox network when they criticized its animated show “Family Guy” for a joke they believed was about Sarah Palin’s son Trig, who has Down syndrome.